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2. Jack (device) - Wikipedia

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

   A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. [1] The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed. Jacks are usually rated ...

3. M816 Wrecker - Wikipedia

   en.wikipedia.org/wiki/M816_Wrecker

   An M816 wrecker being pulled by another M816. The M816 Medium Wrecker is part of the M809 series of 5-ton 6x6 military trucks.It was made by AM General starting in 1970. It has a revolving hydraulic crane with an extending boom that can extend from 10–18 ft with a maximum lift capacity of 20,000 lb with outriggers and boom jacks to the ground.

4. Car crusher - Wikipedia

   en.wikipedia.org/wiki/Car_crusher

   A heavy-duty lowboy trailer is attached to the bottom of the mobile car crusher and can be transported only using a semi-trailer truck. Due to the increase in car production, scrap metal became high in demand, so the mobile car crusher was made to increase efficiency of gathering scrap metal.

5. Crusher - Wikipedia

   en.wikipedia.org/wiki/Crusher

   A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, sand or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.

6. M939 series 5-ton 6×6 truck - Wikipedia

   en.wikipedia.org/wiki/M939_series_5-ton_6×6_truck

   The M931 (M932 w/winch) was a semi-tractor used to tow semi-trailers up to 37,500 pounds (17,000 kg). A front-mounted winch was optional. Unlike commercial trucks the fifth-wheel could also pivot side to side, making a more flexible connection to the trailer. Even so, off-road performance was limited. [14]

7. Jackscrew - Wikipedia

   en.wikipedia.org/wiki/Jackscrew

   A screw jack consists of a heavy-duty vertical screw with a load table mounted on its top, which screws into a threaded hole in a stationary support frame with a wide base resting on the ground. A rotating collar on the head of the screw has holes into which the handle, a metal bar, fits.