hydraulic jack

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hydraulic jack

[hī′drȯ·lik ′jak]
(mechanical engineering)
A jack in which force is applied through the mechanism of a hydraulic press.

hydraulic jack

hydraulic jack
A jack operated by means of a liquid, usually oil, acting against a piston; a small force, applied by means of a lever attached to a small piston, produces a very large force on a large piston.