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2. Quick coupler - Wikipedia

   en.wikipedia.org/wiki/Quick_coupler

   There are many variations in the design of quick couplers. The initial divergence is between those that can pick up any of a range of buckets and attachments by clamping onto the mounting pins for the attachment (known as "pin grabbers" or "pin couplers") and those that work only with buckets and attachments designed to suit that quick coupler (known as "dedicated").

3. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   A Thornycroft steam tractor with articulated trailer competed in the 1898 heavy vehicle trials in Liverpool which took place from May 24 to May 28. [1] Built by the Steam Carriage and Wagon Company of Chiswick, the trailer and tractor unit were connected by a turntable though the details of the coupling are not revealed apart from a schematic.

4. Kavach (train protection system) - Wikipedia

   en.wikipedia.org/wiki/Kavach_(train_protection...

   Primarily, Kavach works on the principle of continuous supervision of the movement authority and is designed to maintain train speed within the specified limits and can automatically apply brakes to slow down or to bring the train to a complete standstill, in case the Loco Pilots violates the speed restrictions or fails to act in time to prevent Signal Passed At Danger (SPAD); thereby reducing ...

5. List of friction hitch knots - Wikipedia

   en.wikipedia.org/wiki/List_of_friction_hitch_knots

   A friction hitch is a kind of knot used to attach one rope to another in a way that is easily adjusted. These knots are commonly used in climbing as part of single-rope technique , doubled-rope technique and as "ratchets" to capture progress on a moving rope, most typically in a mechanical advantage system such as a Z-drag .