Bohrlochkopf und Haenger fuer die Verrohrung von Bohrloechern,申请号DE196400G2453-传众专利搜索

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发明名称	Bohrlochkopf und Haenger fuer die Verrohrung von Bohrloechern
摘要
申请公布号	DE1237517(B)	申请公布日期	1967.03.30
申请号	DE196400G2453	申请日期	1964.12.31
申请人	GRAY TOOL COMPANY	发明人	JUN. ELWOOD KEMPTON PIERCE
分类号	E21B33/04;E21B33/043	主分类号	E21B33/04
代理机构		代理人
主权项
地址

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