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No specification found for this NSN.
A device consisting of a ram, hydraulically actuated by a hand-operated pump(s). The units may be combined on a single base, in a common body or be of the remote control type. The ram is actuated by a hydraulic force in one direction only. Excludes jack, bumper; dolly type jacks; folding tripod type jacks and items with reversing valve mechanisms for performing pulling actions by changing the direction of the hydraulic force applied to the ram.