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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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FR511702A1915-07-031915-07-03Distribution pour outils pneumatiques avec échappement direct à l'extérieur
ExpiredFR511702A
(fr)