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2. Semi-trailer aerodynamic device - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer_aerodynamic...

   Semi-trailer aerodynamic devices are devices affixed to semi-trailers, for the purpose of reducing aerodynamic drag caused by air turbulence. The two major types of device in use are trailer skirts (or side skirts ), affixed to the underside of trailers, and trailer tails (or boat tails , or rear fairings ), affixed to the rear.

3. Flatbed truck - Wikipedia

   en.wikipedia.org/wiki/Flatbed_truck

   In North America, the length is commonly 48 or 53 feet (14.63 or 16.15 m), and the width is either 96 or 192 inches (2.44 or 4.88 m) (including rub rails and stake pockets on the sides, which generally placed every 2 feet or 61 cm). Some older trailers still in service are only 45 feet (13.72 m) or shorter if used in sets of doubles or triples ...

4. Trailer connectors in military organizations - Wikipedia

   en.wikipedia.org/wiki/Trailer_connectors_in...

   Tail lamps, clearance lamps/outline marker lamps and registration plate lamp left side. B Tail lamps, clearance lamps/outline marker lamps and registration plate lamp right side. C Stop lamps: D Left Turn Signal: E Right Turn Signal: F Blackout marker lights: H Blackout stop lights: J +24V or +12V [SE 1]; via ignition lock OR permanent [SE 2 ...

5. Twistlock - Wikipedia

   en.wikipedia.org/wiki/Twistlock

   The hole is an oval 4.9 in (124.5 mm) on the long axis with two flat sides 2.5 in (63.5 mm) apart. The male component is the twistlock, which is fitted to cranes and transport bases. This can be inserted through the hole (it is roughly 4.1 in or 104.1 mm long and 2.2 in or 55.9 mm wide), and then the top portion (normally pointed to make ...

6. Semi-trailer - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer

   A tractor unit pulling a semi-trailer A truck pulling a semitrailer using a trailer dolly. A semi-trailer is a trailer without a front axle.The combination of a semi-trailer and a tractor truck is called a semi-trailer truck (also known simply as a "semi-trailer", "tractor trailer", or "semi" in the United States).

7. Rail fastening system - Wikipedia

   en.wikipedia.org/wiki/Rail_fastening_system

   Rail anchors, also called anticreepers, are spring steel clips that attach to the underside of the rail baseplate and bear against the sides of the sleepers to prevent longitudinal movement of the rail, either from changes in temperature or through vibration. Anchors may be attached and removed either by hand with hammers, or by an anchor machine.