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2. Jack (device) - Wikipedia

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

   The farm jack also known as a railroad jack, high lift jack, handyman jack, trail jack or kanga-jack was invented in 1905. It consists of a steel beam with a series of equally spaced holes along its length, and a hand-operated mechanism which can be moved from one end of the beam to the other through the use of a pair of climbing pins.

3. Airlift (dredging device) - Wikipedia

   en.wikipedia.org/wiki/Airlift_(dredging_device)

   The bubble moves water through the pipe sucking debris from the lower end and depositing it from the upper end of the pipe. Ejected debris can be either cast off (as in simply removing overburden) or collected in a mesh cage for inspection (as more often is the case in nautical archaeology). It is often designed to be hand-operated by a diver. [2]

4. Jackscrew - Wikipedia

   en.wikipedia.org/wiki/Jackscrew

   A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderate and heavy weights, such as vehicles; to raise and lower the horizontal stabilizers of aircraft; and as adjustable supports for heavy loads, such as the foundations of houses.

5. Pneumatic tool - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_tool

   A pneumatic tool, air tool, air-powered tool or pneumatic-powered tool is a type of power tool, driven by compressed air supplied by an air compressor. Pneumatic tools can also be driven by compressed carbon dioxide (CO 2 ) stored in small cylinders allowing for portability.

6. Strand jack - Wikipedia

   en.wikipedia.org/wiki/Strand_jack

   A strand jack is a hollow hydraulic cylinder with a set of steel cables (the "strands") passing through the open centre, each one passing through two clamps - one mounted to either end of the cylinder. The jack operates in the manner of a caterpillar's walk: climbing (or descending) along the strands by releasing the clamp at one end, expanding ...

7. Ground support equipment - Wikipedia

   en.wikipedia.org/wiki/Ground_support_equipment

   Aircraft jack lift used to support the tail of an EVA Air Boeing 747 to avoid the aircraft tail from falling to ground during the cargo loading/unloading activity in which the "tail heavy" situation may occur. They are used to support a parked aircraft to prevent their tail from drooping or even falling to the ground.