The five star motor is a piston pneumatic motor: it is composed of connecting rod, crankshaft, piston, cylinder, body, valve and so on. Compressed air is supplied to each cylinder in turn through the distribution valve, thus expanding to do work and pushing the crankshaft to rotate through the connecting rod. The work comes mainly from the expansion work of the gas. Can be used in all kinds of heavy shovel crawler crane and pile driver

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