Dispositif de serrage de tiges de forage,申请号FR19670109391-传众专利搜索

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发明名称	Dispositif de serrage de tiges de forage
摘要
申请公布号	FR1531725(A)	申请公布日期	1968.07.05
申请号	FR19670109391	申请日期	1967.06.07
申请人	DRESSER INDUSTRIES, INC.	发明人
分类号	E21B19/06	主分类号	E21B19/06
代理机构		代理人
主权项
地址

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