CPC Subgroup
B25D 9/26 Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
Full Title
Portable percussive tools with fluid-pressure drive, , e.g. having several percussive tool bits operated simultaneously > Control devices for the reciprocating piston > Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
1 direct subcode
Child Classifications
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