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2. Gladhand connector - Wikipedia

   en.wikipedia.org/wiki/Gladhand_connector

   A pair of gladhand connectors between railroad cars A gladhand connector on a trailer. A gladhand connector or gladhand coupler is an interlocking hose coupling fitted to hoses supplying pressurized air from a tractor unit to air brakes on a semi-trailer, [1] or from a locomotive to railway air brakes on railroad cars. [2]

3. Tightlock coupling - Wikipedia

   en.wikipedia.org/wiki/Tightlock_coupling

   The couplers automatically lock when cars are pushed together, but workers must go between cars to hook up the air lines for the pneumatic brakes and connect cables for head-end power and other communications. To separate cars, a worker must use a lever to move the locking pin that keeps the coupler closed.

4. Tow hitch - Wikipedia

   en.wikipedia.org/wiki/Tow_hitch

   A tow hitch (or tow bar or trailer hitch in North America [1]) is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer , or a tow pin, or a tow hook with a trailer loop, often used for large or agricultural vehicles ...

5. Coaxial power connector - Wikipedia

   en.wikipedia.org/wiki/Coaxial_power_connector

   A "lock-ring DC coaxial connector" uses a captive threaded ring or collar to secure the connection between the plug and jack. This design offers strong resistance to unplugging when used properly. Lock-ring DC coaxial connectors. The knurled barrel allows the plug to be secured to jacks that have mating male threads.

6. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   The automatic semi-trailer coupling patented by Fruehauf dominated the semi-trailer market until the Fruehauf Trailer Corporation's assets were sold in bankruptcy to Wabash National in 1997. Another fifth wheel patent U.S. 2,053,812 [ 9 ] was issued to Charles E. Bradshaw of Wellville, Virginia , filed March 18, 1936 and granted September 8, 1936.

7. The best gifts to buy your grandkids — from babies to big ...

   www.aol.com/lifestyle/the-best-gifts-to-buy-your...

   Tractor and Trailer Battery-Powered Ride-On. $214 at Walmart. 7-in-1 Kids Indoor Swedish Playground . $270 at Walmart. Wisairt Kids Play Ten. $20 at Walmart. Ride on Wiggle Car. $60 at Walmart.