DRILLING DEVICE,申请号ZM19820000061-传众专利搜索

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发明名称	DRILLING DEVICE
摘要
申请公布号	ZM6182(A1)	申请公布日期	1984.04.23
申请号	ZM19820000061	申请日期	1982.08.06
申请人	ENGTECH SA	发明人
分类号	E21B4/02;E21B10/08;E21B10/12;E21B17/10;(IPC1-7):E21B4/02	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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