VACUUM COUPLING FOR PERCUSSIVE HAMMERS,申请号USD3490779-传众专利搜索

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发明名称	VACUUM COUPLING FOR PERCUSSIVE HAMMERS
摘要
申请公布号	US3490779(A)	申请公布日期	1970.01.20
申请号	USD3490779	申请日期	1967.09.14
申请人	PHILLIPS DRILL CO. INC.	发明人	THOMAS G. BIXBY
分类号	B23Q11/00;B25D17/18;(IPC1-7):B23B31/10	主分类号	B23Q11/00
代理机构		代理人
主权项
地址

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