Trépan de forage,申请号FR19590795191-传众专利搜索

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发明名称	Trépan de forage
摘要
申请公布号	FR1224748(A)	申请公布日期	1960.06.27
申请号	FR19590795191	申请日期	1959.05.21
申请人	REED ROLLER BIT COMPANY	发明人
分类号	E21B10/16	主分类号	E21B10/16
代理机构		代理人
主权项
地址

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