RAISE DRILLING MACHINE,申请号CAD899847-传众专利搜索

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发明名称	RAISE DRILLING MACHINE
摘要
申请公布号	CA899847(A)	申请公布日期	1972.05.09
申请号	CAD899847	申请日期
申请人	SHAFT DRILLERS	发明人	CHARLES K. PRESLEY;WILLIAM A. GLASS
分类号	E21B3/02;E21B7/00;E21B19/00;(IPC1-7):E21B7/00	主分类号	E21B3/02
代理机构		代理人
主权项
地址

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