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2. Hydraulic jigger - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_jigger

   Hydraulic fluid was then pumped from the catch tank by an electric pump and back into the cylinder under pressure. The cylinder was double-ended, with a piston rod and jigger at each end, and the catapult was retracted by the hydraulic pressure forcing the piston backwards, and re-compressing the air reservoirs.

3. Meillerwagen - Wikipedia

   en.wikipedia.org/wiki/Meillerwagen

   The control compartment batteries, alcohol-filling connection, tools, and other equipment were loaded into a box on a strut at the top of the Meillerwagen's lift frame. The Meillerwagen was moved via hand winches to the firing stand and then levelled via the two extendable outriggers with end-jacks. [1]

4. Come-along - Wikipedia

   en.wikipedia.org/wiki/Come-along

   A come-along. A come-along, also known as a power puller, is a hand-operated winch with a ratchet used to pull objects. The drum is wrapped with wire rope.A similar tool that uses a nylon strap is used to straighten trees, as it straightens gradually over time, therefore not splitting the trunk.

5. Jack (device) - Wikipedia

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

   A demonstration of using two stacked air bags to lift the rear of a car. An inflatable jack, lifting bag, or pneumatic lifting bag is an air bag that is inflated by compressed air (without a hydraulic component) in order to lift objects. The bag can be deflated to be reused later.

6. Active heave compensation - Wikipedia

   en.wikipedia.org/wiki/Active_heave_compensation

   [4] [5] Hydraulic "active boost" winches control the oil flow from the pump(s) to the winch so that the target position is reached. Hydraulic winch systems can use accumulators and passive heave compensation to form a semi-active system with both an active and a passive component. In such systems the active part will take over when the passive ...

7. Hoist (device) - Wikipedia

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

   Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.