DRILL FOR ROTATIONAL BORING,申请号PL19750182612-传众专利搜索

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发明名称	DRILL FOR ROTATIONAL BORING
摘要
申请公布号	PL101554(B1)	申请公布日期	1979.01.31
申请号	PL19750182612	申请日期	1975.08.05
申请人		发明人
分类号	(IPC1-7):E21B9/02	主分类号	(IPC1-7):E21B9/02
代理机构		代理人
主权项
地址

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