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Priority claimed from DE19712155689external-prioritypatent/DE2155689C3/de
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Publication of JPS4876161ApublicationCriticalpatent/JPS4876161A/ja
Publication of JPS5222154B2publicationCriticalpatent/JPS5222154B2/ja
B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
B25D9/06—Means for driving the impulse member
B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine