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Table tennis is more commonly known as ping-pong.
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Folding table-tennis tables
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00:00:58,392 --> 00:01:01,326
are popular in homes
and kept outdoors
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00:01:01,328 --> 00:01:04,730
because they can be closed up
and rolled out of the way.
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00:01:04,732 --> 00:01:08,167
These tables can also fold down
on just one side,
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00:01:08,169 --> 00:01:10,269
allowing for solo play.
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00:01:14,141 --> 00:01:16,675
This high-end outdoor
table-tennis table
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has an aluminum bottom
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that prevents the tabletop,
called the plate,
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from warping or splitting
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00:01:22,216 --> 00:01:25,350
due to expansion
and contraction.
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00:01:25,352 --> 00:01:28,720
A press stamps cups
into a sheet of aluminum.
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00:01:28,722 --> 00:01:31,290
This pattern creates
nearly equal areas
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00:01:31,292 --> 00:01:34,226
both in contact
and out of contact
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00:01:34,228 --> 00:01:37,362
with the rest of the plate
layers, providing flexibility
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00:01:37,364 --> 00:01:40,332
to withstand
temperature-related movement.
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00:01:40,334 --> 00:01:43,502
Each table needs two
embossed aluminum sheets --
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00:01:43,504 --> 00:01:47,339
one for each half of the plate.
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00:01:47,341 --> 00:01:50,476
A technician assembles frames
for the plate halves
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00:01:50,478 --> 00:01:53,045
out of square extruded
aluminum tubes,
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00:01:53,047 --> 00:01:57,249
cut to the lengths and widths
of the plate half perimeter.
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00:01:57,251 --> 00:02:00,018
An automated milling machine
makes miter cuts,
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00:02:00,020 --> 00:02:03,856
which allow the tubes
to be made into rectangles.
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00:02:06,660 --> 00:02:08,861
Then, the technician
moves the frames
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00:02:08,863 --> 00:02:11,029
onto a rotating fixture...
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00:02:17,238 --> 00:02:19,571
...And welds
the corners together.
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00:02:28,282 --> 00:02:33,018
the frames are inserted
into a brushing machine.
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00:02:33,020 --> 00:02:36,655
Inside, wire brush rollers
allow the aluminum surface
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00:02:36,657 --> 00:02:37,890
to become rough.
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00:02:37,892 --> 00:02:41,226
This helps the components
to adhere to one another.
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00:02:44,532 --> 00:02:47,633
another technician places the
embossed aluminum sheet
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00:02:47,635 --> 00:02:50,002
into a rectangular assembly jig.
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00:02:54,241 --> 00:02:56,575
And adds the
brushed aluminum frame.
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00:03:01,315 --> 00:03:06,351
A conveyor transfers the jig
to the next station.
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00:03:06,353 --> 00:03:07,753
Then, the jig connects with
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00:03:07,755 --> 00:03:10,389
an 8-millimeter-thick sheet
of particleboard,
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00:03:10,391 --> 00:03:12,858
made of wood chips and glue.
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00:03:12,860 --> 00:03:15,360
The board is coated with a
heat-activated adhesive film
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00:03:15,362 --> 00:03:17,262
on both sides.
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00:03:19,833 --> 00:03:23,101
At the next station,
an aluminum sheet is placed
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00:03:23,103 --> 00:03:25,637
on top of the particleboard.
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00:03:25,639 --> 00:03:28,874
This step completes
the plate component assembly.
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00:03:31,345 --> 00:03:34,546
Next, the conveyor loads
the jig into a press.
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00:03:36,150 --> 00:03:39,251
Once 12 jigs have been loaded
onto the press,
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00:03:39,253 --> 00:03:42,054
it heats to
239 degrees fahrenheit.
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00:03:42,056 --> 00:03:44,590
And compresses them
for about 10 minutes.
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00:03:44,592 --> 00:03:46,425
This process
activates the adhesive
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00:03:46,427 --> 00:03:50,362
and bonds the components of
each plate into a single unit --
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00:03:50,364 --> 00:03:52,564
one framed plate half.
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00:03:54,401 --> 00:03:58,036
Each plate half goes through
an automated milling machine.
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00:04:03,711 --> 00:04:08,046
the machine trims any excess
material from all four sides
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00:04:08,048 --> 00:04:11,717
to ensure the table won't
have any sharp edges.
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00:04:26,100 --> 00:04:28,433
the plate half goes
through a paint machine,
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00:04:28,435 --> 00:04:30,202
then into an oven.
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00:04:30,204 --> 00:04:34,206
The process repeats,
applying a second coat of paint
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00:04:34,208 --> 00:04:38,343
and a u.V.-Resistant clear coat.
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00:04:38,345 --> 00:04:41,680
A machine applies paint
through a screen stencil,
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00:04:41,682 --> 00:04:43,782
printing the lines
that mark the boundaries
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00:04:43,784 --> 00:04:46,518
of the playing surface.
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00:04:49,356 --> 00:04:52,491
After the paint is dried
in an oven,
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00:04:52,493 --> 00:04:56,261
a team places the finished
plate half in a cardboard box
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00:04:56,263 --> 00:04:59,631
and attaches folding legs
to the base.
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00:04:59,633 --> 00:05:01,900
The factory
mills the legs in-house
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00:05:01,902 --> 00:05:03,702
out of high-tensile steel,
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00:05:03,704 --> 00:05:06,471
then finishes them
in baked-on paint.
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00:05:08,242 --> 00:05:10,942
The net,
along with several components,
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00:05:10,944 --> 00:05:12,744
are packed and made in-house,
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00:05:12,746 --> 00:05:16,348
which the consumer later
assembles to the table.
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00:05:16,350 --> 00:05:19,885
Components include the net
posts, side panels, wheels,
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00:05:19,887 --> 00:05:23,121
wheel brakes, and
the ball return box.
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00:05:23,123 --> 00:05:25,324
Finally,
the plate half is transferred to
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00:05:25,326 --> 00:05:29,728
an automated system,
which completes the packaging.
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00:05:29,730 --> 00:05:31,763
Many ping-pong tables
on the market
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00:05:31,765 --> 00:05:33,732
require the net to be removed
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00:05:33,734 --> 00:05:36,168
every time you fold the table.
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00:05:36,170 --> 00:05:37,436
The design of this table
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00:05:37,438 --> 00:05:40,038
enables the net
to remain in place
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00:05:40,040 --> 00:05:42,441
whether the table is
folded for storage
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or has one or both sides
open for playing.
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00:05:46,647 --> 00:05:50,682
Less setup time
means more time to play.
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00:06:05,666 --> 00:06:09,801
narrator:
Plastic model kits were
developed before world war ii,
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00:06:09,803 --> 00:06:12,671
when people became interested
in seeing machines
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00:06:12,673 --> 00:06:14,873
in small-scale replication.
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00:06:14,875 --> 00:06:17,676
Today plastic model kits
continue to offer
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00:06:17,678 --> 00:06:19,978
building opportunities
to hobbyists,
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00:06:19,980 --> 00:06:21,079
who love the challenge
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00:06:21,081 --> 00:06:23,548
of putting
little pieces together.
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00:06:25,986 --> 00:06:27,652
With a plastic model kit,
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00:06:27,654 --> 00:06:31,890
a colossal ocean liner can be
replicated in small scale.
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00:06:31,892 --> 00:06:34,226
Built with nearly 2,000 pieces,
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00:06:34,228 --> 00:06:37,162
assembly is all about
the details.
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00:06:37,164 --> 00:06:40,031
Each model kit starts
with extensive research
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00:06:40,033 --> 00:06:41,366
and design,
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00:06:41,368 --> 00:06:44,403
a process that can take up to
a year to complete
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00:06:44,405 --> 00:06:47,806
and cost up to
$100,000 dollars.
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00:06:47,808 --> 00:06:49,674
Using the computer design,
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00:06:49,676 --> 00:06:51,543
a set of steel molds is made
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00:06:51,545 --> 00:06:55,380
for every piece of the kit.
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00:06:55,382 --> 00:06:57,182
Tools carve into steel chunks
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00:06:57,184 --> 00:06:58,750
to make the molds.
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00:06:58,752 --> 00:07:03,989
Precision work
done entirely by machinery.
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00:07:03,991 --> 00:07:08,226
Installed in large dies, the
molds are linked by channels.
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00:07:08,228 --> 00:07:10,495
Melted plastic will flow
through the channels
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00:07:10,497 --> 00:07:12,597
to fill the molds.
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00:07:12,599 --> 00:07:17,803
Clear polystyrene is used
for transparent components.
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00:07:17,805 --> 00:07:20,705
The melted polystyrene is
pumped under high pressure
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00:07:20,707 --> 00:07:22,374
into the molds.
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00:07:22,376 --> 00:07:25,577
Once the plastic hardens,
a pusher ejects the parts.
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00:07:27,815 --> 00:07:31,850
The connected kit parts
are known as a tree.
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00:07:31,852 --> 00:07:35,754
The opaque polystyrene pellets
are used to form
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00:07:35,756 --> 00:07:40,425
the other kit parts
and are molded separately.
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00:07:40,427 --> 00:07:43,161
The scale of the parts
is 1 to 24,
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00:07:43,163 --> 00:07:47,933
which means the model will be
1/24 the size of the original.
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00:07:47,935 --> 00:07:50,402
Since the manufacturing
is automated,
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00:07:50,404 --> 00:07:52,771
the risk of contamination
is reduced.
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00:07:55,409 --> 00:07:59,377
Next, the tree is put through
a technical analysis test.
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00:07:59,379 --> 00:08:01,847
The technician photographs
the tree
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00:08:01,849 --> 00:08:05,217
and compares it to an image
already fit to scale.
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00:08:05,219 --> 00:08:07,285
If some parts
haven't taken shape
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00:08:07,287 --> 00:08:09,554
or if they're only
partially formed,
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00:08:09,556 --> 00:08:13,225
more pressure may be needed
to ensure that the polystyrene
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00:08:13,227 --> 00:08:16,361
flows into
all the mold cavities.
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00:08:16,363 --> 00:08:20,298
A technician compares a randomly
selected tree to the design
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00:08:20,300 --> 00:08:24,469
and verifies that no parts
are poorly formed or missing.
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00:08:24,471 --> 00:08:26,838
Once the confirmation
is attained,
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00:08:26,840 --> 00:08:29,140
the technician slides
the model kit parts
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00:08:29,142 --> 00:08:32,978
into a clear plastic sleeve.
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00:08:32,980 --> 00:08:34,913
Before it's ready for retail,
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00:08:34,915 --> 00:08:38,950
the kit needs a set of
illustrated instructions.
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00:08:38,952 --> 00:08:41,520
The designer
deconstructs the model
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00:08:41,522 --> 00:08:44,055
and then reconstructs
it on his computer
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00:08:44,057 --> 00:08:47,359
as he draws up the instructions.
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00:08:47,361 --> 00:08:49,728
With the instruction manual
complete,
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00:08:49,730 --> 00:08:53,498
a team packs all the components
of the model kit in a box.
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00:08:55,669 --> 00:08:59,971
One of each of the kit trees
is placed in each box.
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00:08:59,973 --> 00:09:01,940
The kit also includes decals
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00:09:01,942 --> 00:09:04,409
and large,
separately molded parts,
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00:09:04,411 --> 00:09:06,578
like the ocean liner hull.
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00:09:07,714 --> 00:09:11,016
A technician closes the box.
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00:09:11,018 --> 00:09:12,517
As it moves down a conveyor,
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00:09:12,519 --> 00:09:14,686
a laser prints the date of
production
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00:09:14,688 --> 00:09:16,721
and the batch number
on the side.
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00:09:18,392 --> 00:09:20,759
Then, the box
is wrapped in plastic,
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00:09:20,761 --> 00:09:22,460
and the ends are sealed
with heat guns.
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00:09:24,398 --> 00:09:28,466
A year of planning has gone into
making the plastic mold kit.
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00:09:28,468 --> 00:09:32,137
But took less than 10 minutes
to mold the kit parts
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00:09:32,139 --> 00:09:35,941
and package them.
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00:09:35,943 --> 00:09:39,544
Building the model will
take 10 to 12 hours.
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00:09:39,546 --> 00:09:42,380
The factory does a test build
on each model
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00:09:42,382 --> 00:09:46,618
to confirm that it
comes together as planned.
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00:09:46,620 --> 00:09:50,121
This is the iconic
constellation aircraft,
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00:09:50,123 --> 00:09:52,857
a world war ii
military transport plane
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00:09:52,859 --> 00:09:57,028
that was later converted
to a commercial airliner.
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00:09:57,030 --> 00:09:58,930
Assembling a plastic model kit
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00:09:58,932 --> 00:10:03,168
can be a great learning
experience for the builder.
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00:10:03,170 --> 00:10:05,503
Decals mimic
the I.D. Information
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00:10:05,505 --> 00:10:08,106
on the outside
of the original aircraft.
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00:10:10,177 --> 00:10:13,712
These decals have been
pretreated with adhesive.
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00:10:17,718 --> 00:10:20,619
Soaking the decals in water
activates them.
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00:10:23,123 --> 00:10:25,056
The assembler brushes more water
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00:10:25,058 --> 00:10:26,958
onto the design spots
on the model.
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00:10:29,096 --> 00:10:32,931
And applies the decals
to the dampened spots.
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00:10:32,933 --> 00:10:36,101
As the glue dries,
they adhere to each other.
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00:10:40,474 --> 00:10:42,540
The plastic models
can also be painted
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00:10:42,542 --> 00:10:44,709
before the decals are applied
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00:10:44,711 --> 00:10:48,880
for refined and clean look
that really comes together.
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narrator:
The light microscope was
invented in 16th-century europe.
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00:11:07,634 --> 00:11:10,368
It allowed the human eye
to see tiny things
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00:11:10,370 --> 00:11:12,871
that couldn't be seen before.
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00:11:12,873 --> 00:11:14,706
A sophisticated research tool
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00:11:14,708 --> 00:11:17,242
with focused light
and optical lenses,
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00:11:17,244 --> 00:11:19,544
can magnify
biological tissue,
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00:11:19,546 --> 00:11:22,047
minerals, and computer chips.
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00:11:24,317 --> 00:11:27,419
Observation is an important
aspect of science.
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00:11:27,421 --> 00:11:31,022
The light microscope increases
the power of observation,
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00:11:31,024 --> 00:11:33,124
making it possible to see things
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00:11:33,126 --> 00:11:35,727
that can't be seen with the
naked eye.
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00:11:35,729 --> 00:11:39,731
This 19th-century microscope
represented a turning point,
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00:11:39,733 --> 00:11:42,801
with lenses that delivered
more light to specimens,
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00:11:42,803 --> 00:11:45,336
increasing resolution.
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00:11:45,338 --> 00:11:48,239
A light microscope often
has multiple lenses,
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00:11:48,241 --> 00:11:53,311
all made from
special optical glass.
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00:11:53,313 --> 00:11:56,181
A drill with a core bit
tunnels into the glass
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00:11:56,183 --> 00:12:00,085
to produce several
solid cylinders.
185
00:12:00,087 --> 00:12:02,320
The drill cuts them larger
and thicker
186
00:12:02,322 --> 00:12:04,956
than the final specifications.
187
00:12:04,958 --> 00:12:08,059
This gives technicians
extra material to work with.
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00:12:10,664 --> 00:12:13,965
A tool moves the cylinder
against a spinning blade
189
00:12:13,967 --> 00:12:16,735
slicing it into lens blanks.
190
00:12:16,737 --> 00:12:19,471
The cylinder is first glued
to a glass block,
191
00:12:19,473 --> 00:12:21,573
then glued to the tool.
192
00:12:21,575 --> 00:12:24,943
This method holds the cylinder
in the correct position.
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00:12:27,080 --> 00:12:29,914
Since bits of glue are left
on the lenses,
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00:12:29,916 --> 00:12:32,784
a thorough washing removes them.
195
00:12:35,322 --> 00:12:39,357
Next, a device grips the lens
using vacuum pressure
196
00:12:39,359 --> 00:12:41,726
and angles it for grinding.
197
00:12:44,965 --> 00:12:48,767
Multiple grinding tools
remove any excess glass
198
00:12:48,769 --> 00:12:51,803
and shape the radius
of the lens.
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00:12:54,407 --> 00:12:56,674
In a process known as lapping,
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00:12:56,676 --> 00:12:59,410
a technician applies
a fine abrasive compound
201
00:12:59,412 --> 00:13:03,248
to a bowl
with the desired contours.
202
00:13:03,250 --> 00:13:05,850
He rotates and rubs the lens
against the bowl
203
00:13:05,852 --> 00:13:07,385
to further shape the lens.
204
00:13:10,423 --> 00:13:13,591
He rinses off the lens
and holds it against a light
205
00:13:13,593 --> 00:13:16,094
while he examines it
for scratches.
206
00:13:19,232 --> 00:13:22,133
He measures the radius
of a master lens
207
00:13:22,135 --> 00:13:25,937
and compares it to that of
the lens he's been working on.
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00:13:25,939 --> 00:13:27,572
If the measurements are off,
209
00:13:27,574 --> 00:13:30,308
he'll remove more material.
210
00:13:30,310 --> 00:13:32,777
Once additional material
is removed,
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00:13:32,779 --> 00:13:34,813
he measures
the thickness of the lens
212
00:13:34,815 --> 00:13:37,448
and compares it to what it was
before the adjustments.
213
00:13:41,054 --> 00:13:43,755
Next, these polishing tools
will be used
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00:13:43,757 --> 00:13:47,192
to fine-tune the profile
of the microscope lenses.
215
00:13:50,697 --> 00:13:52,964
To protect the lenses
during polishing,
216
00:13:52,966 --> 00:13:56,000
a technician sprays on
a temporary lacquer.
217
00:13:57,971 --> 00:13:59,671
These tools will remove
218
00:13:59,673 --> 00:14:02,307
just a fraction of a millimeter
of glass,
219
00:14:02,309 --> 00:14:05,410
but it will make
an important impact.
220
00:14:05,412 --> 00:14:07,946
Polishing liquid
provides fine abrasion
221
00:14:07,948 --> 00:14:11,316
and enables the tool
to move across the glass.
222
00:14:14,521 --> 00:14:18,456
Then, a robot trims
the edges of the lens.
223
00:14:18,458 --> 00:14:20,892
A device clamps
the lens in place
224
00:14:20,894 --> 00:14:24,262
as trimming continues
along the edges.
225
00:14:26,199 --> 00:14:29,400
Trimming allows the lens
to reach the correct diameter.
226
00:14:31,238 --> 00:14:33,638
Next,
the lenses are cleaned
227
00:14:33,640 --> 00:14:36,574
in multiple
water-based solutions.
228
00:14:36,576 --> 00:14:40,178
In the baths, the vibrations
from high-frequency sound
229
00:14:40,180 --> 00:14:43,014
create a gentle
scrubbing action.
230
00:14:43,016 --> 00:14:47,652
The intensive cleaning
leaves the lenses pristine.
231
00:14:47,654 --> 00:14:50,355
A technician places
the freshly cleaned lenses
232
00:14:50,357 --> 00:14:52,757
in round trays.
233
00:14:52,759 --> 00:14:54,692
She handles them very carefully
234
00:14:54,694 --> 00:14:58,429
inserting them individually
into each tray slot.
235
00:14:58,431 --> 00:15:00,231
Because they're
extremely fragile,
236
00:15:00,233 --> 00:15:03,835
the slightest pressure
could crack them.
237
00:15:07,040 --> 00:15:09,207
The lenses in the trays
will receive
238
00:15:09,209 --> 00:15:11,075
an antireflective coating --
239
00:15:11,077 --> 00:15:15,113
one that will prevent a loss
of light due to reflection.
240
00:15:17,984 --> 00:15:20,251
Next,
the antireflective material
241
00:15:20,253 --> 00:15:22,754
is loaded into
a coating machine.
242
00:15:22,756 --> 00:15:24,722
The technician adds
a specific amount
243
00:15:24,724 --> 00:15:28,626
of magnesium fluoride
into a receptacle in the base.
244
00:15:32,299 --> 00:15:34,699
She inserts a piece
of aluminum oxide
245
00:15:34,701 --> 00:15:36,668
in the next receptacle.
246
00:15:39,673 --> 00:15:42,974
And transfers the microscope
lenses to the chamber,
247
00:15:42,976 --> 00:15:46,611
placing the rack on top.
248
00:15:46,613 --> 00:15:50,014
Inside the chamber, heat
and a targeted plasma beam
249
00:15:50,016 --> 00:15:52,317
evaporate the materials.
250
00:15:52,319 --> 00:15:54,452
They precipitate
onto the lenses,
251
00:15:54,454 --> 00:15:56,654
forming a coating.
252
00:15:56,656 --> 00:15:58,756
Coming up, all is revealed
253
00:15:58,758 --> 00:16:01,826
as the lenses come together
in the microscope.
254
00:16:15,308 --> 00:16:18,643
narrator:
Light microscopes bring
the invisible into focus.
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Similar to telescopes,
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a tiny specimen is placed
under the lens assembly,
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from which the viewer can
discover what lies within.
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By magnifying the minuscule,
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the light microscope
has become an indispensable
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scientific tool.
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The light microscope
often has multiple lenses.
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Throughout
the production process,
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the lenses are put under
the microscope
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to confirm
that the geometry is correct.
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A technician magnifies
the lenses one at a time,
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measuring their radius
and the diameter.
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Meanwhile, computerized tools
shape the edges of glass prisms.
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The prisms are triangular lenses
that bend or refract light,
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aligning colors at a focal point
for a clearer image.
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Once the shaping is complete,
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a technician positions a prism
on a holder to be calibrated.
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She aims a laser at it.
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The light passes
through the prism,
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reflected in a mirror,
and bounces back.
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A computer magnifies
the surface of the prism
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a thousand times bigger than its
original size,
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measuring the degree to which
the prism refracts light
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and the flatness on each side.
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This is an inside look at a
microscope lens assembly,
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revealing
the combination of lenses.
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A prism can be an important
part of this combination.
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The cast-aluminum housing
has been equipped
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with the circuitry.
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Some of the connections
have already been made.
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It's ready
for the focusing mechanisms
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that allow the user to zoom in
on tissue or other specimens.
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A technician inserts
the motorized focus drive
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into the housing
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so that the ends protrude
from both sides.
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he attaches adjustment knobs
to the ends.
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The larger part of the knob
is for quick motorized focus.
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The small one is for slower
and more precise focusing.
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he slides
a protective rubber cap
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onto the fine-focus component
of the knob.
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Another technician
mounts a system
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for revolving lenses
to the microscope.
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This is called the nosepiece.
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He wires the nosepiece
to the controls.
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Using compressed air,
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a technician cleans a part
known as the side port revolver.
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It's equipped with a mirror,
prism lens,
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and a magnifying lens.
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It will reflect light
to the lenses in the eyepiece
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or external cameras.
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Then the side port revolver
is tested.
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At this point, multiple lenses
have been installed
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in the tube lens assembly.
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The technician screws the
assembly to a revolver.
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Light from
the illuminated specimen
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shines through the tube lens
in parallel rays
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the rays are projected
onto the eyepiece
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or external camera.
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He looks through the eyepiece
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to check the positioning
of the lens in the revolver slot
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making adjustments if needed.
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A reflected-light illumination
system is installed.
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This part directs light through
the lens and onto the specimen,
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then back through the lens
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to the eyepiece
or external cameras.
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This system makes it possible
to magnify opaque specimens.
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Then a technician installs
the transmitted light arm.
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The light arm is used
for magnifying transparent
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or thin specimens.
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It does this by directing
light through them.
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A technician performs
a final inspection.
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He places specimens
under the microscope,
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checking the brightness
of the transmitted light
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and the resolution
of the magnified image.
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He tests the focus of
all the lenses in the nosepiece
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to confirm that each one
delivers a sharp, clear view.
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He verifies that the revolving
mechanisms move smoothly
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and are in good working order.
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After this final inspection,
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this light microscope
is ready for research.
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