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2. Jack (device) - Wikipedia

   en.wikipedia.org/wiki/Jack_(device)

   A scissor jack use the mechanical advantage of a leadscrew and 4-bar linkage to allow a human to lift a vehicle by manual force alone. They are inexpensive and are common in manufacturer-supplied breakdown kits. The jack shown at the left is made for a modern vehicle and the notch fits into a jack-up point [3] on a unibody. Earlier versions ...

3. Jackscrew - Wikipedia

   en.wikipedia.org/wiki/Jackscrew

   is the length of the jack handle, from the screw axis to where the force is applied is the lead of the screw. The screw jack consists of two simple machines in series; the long operating handle serves as a lever whose output force turns the screw. So the mechanical advantage is increased by a longer handle as well as a finer screw thread.

4. Pumpjack - Wikipedia

   en.wikipedia.org/wiki/Pumpjack

   A diagram of a pumpjack. A pumpjack is the overground drive for a reciprocating piston pump in an oil well. [1]It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface.

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6. Avery Company - Wikipedia

   en.wikipedia.org/wiki/Avery_Company

   The Avery Company, founded by Robert Hanneman Avery, was an American farm tractor manufacturer famed for its undermounted engine which resembled a railroad engine more than a conventional farm steam engine. Avery founded the farm implement business after the Civil War. His company built a large line of products, including steam engines ...

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