B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
B25D9/14—Control devices for the reciprocating piston
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Physics & Mathematics
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Fluid Mechanics
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Engineering & Computer Science
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Mechanical Engineering
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Shielding Devices Or Components To Electric Or Magnetic Fields
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Liquid Crystal Substances
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Diaphragms For Electromechanical Transducers
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