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2. Frame and panel - Wikipedia

   en.wikipedia.org/wiki/Frame_and_panel

   The basic idea is to capture a 'floating' panel within a sturdy frame, as opposed to techniques used in making a slab solid wood cabinet door or drawer front, the door is constructed of several solid wood pieces running in a vertical or horizontal direction [1] with exposed endgrains. Usually, the panel is not glued to the frame but is left to ...

3. Filing cabinet - Wikipedia

   en.wikipedia.org/wiki/Filing_cabinet

   The four-drawer vertical file, letter width, is the version purchased by most businesses. The two-drawer file is sold mostly for use alongside a desk. The five-drawer file is mostly purchased by Federal, State, and Local governments (in a 28-inch-deep or 710 mm version), as it typically provides the lowest cost per filing inch.

4. Picatinny rail - Wikipedia

   en.wikipedia.org/wiki/Picatinny_rail

   The only significant difference between the MIL-STD-1913 rail and the similar Weaver rail mount are the size and shapes of the slots. Whereas the earlier Weaver rail is modified from a low, wide dovetail rail and has rounded slots, the 1913 rail has a more pronounced angular section and square-bottomed slots. This means that an accessory ...

5. Third rail - Wikipedia

   en.wikipedia.org/wiki/Third_rail

   The third rail is separated into 10 m (32 ft 9 + 3 ⁄ 4 in) long conducting and 3 m (9 ft 10 + 1 ⁄ 8 in) long isolation segments. Each conducting segment is attached to an electronic circuit which will make the segment live once it lies fully beneath the tram (activated by a coded signal sent by the train) and switch it off before it becomes ...

6. Rack railway - Wikipedia

   en.wikipedia.org/wiki/Rack_railway

   John Blenkinsop thought that the friction would be too low from metal wheels on metal rails even on level ground, so he built his steam locomotives for the Middleton Railway in 1812 with a 20-tooth, 3-foot (914 mm) diameter cog wheel (pinion) on the left side that engaged in rack teeth (two teeth per foot) on the outer side of the rail, the ...