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2. 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 ...

3. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin , a 2-or- 3 + 1 ⁄ 2 -inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a ...

4. Ringfeder - Wikipedia

   en.wikipedia.org/wiki/Ringfeder

   A bolt coupling device comprises a drawbar, a swivelable cast "bell" with a horizontal opening in the middle, a machined pin or "bolt", an automatic pin release mechanism, a safety locking device with actuating handle and a cushioned mounting plate. The design of the pin allows articulation of up to 70 degrees around the drawbar eye in the ...

5. Drawbar (haulage) - Wikipedia

   en.wikipedia.org/wiki/Drawbar_(haulage)

   The most common drawbar configuration for heavy vehicles is an A-frame drawbar at the front of a full trailer that connects to a tow coupling on a hauling vehicle [1] On heavy vehicles, the drawbar is coupled using a drawbar eye , typically of 40 mm or 50 mm diameter, connected to a bolt and pin coupling.

6. 14 Things That Might Be Causing Pain in Your Lower Left Abdomen

   www.aol.com/14-things-might-causing-pain...

   Pain in the lower left abdomen may be caused by several different conditions. Experts explain.

7. Is Retro Walking The Best Workout You’re Not Doing ... - AOL

   www.aol.com/retro-walking-best-workout-not...

   $178.00 at amazon.com. How To Do Retro Walking Safely. Whether you’re trying retro walking for fun or fitness, safety should be your top priority.