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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
Dispositif de verrouillage destine a empecher l'actionnement non autorise d'une broche de reglage d'un appareil de sectionnement de conduite.