Système de foncage de puits de mine profonds,申请号FRD684124-传众专利搜索

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发明名称	Système de foncage de puits de mine profonds
摘要
申请公布号	FR684124(A)	申请公布日期	1930.06.21
申请号	FRD684124	申请日期	1929.02.23
申请人		发明人	PATTBERG WILHELM;RUHL BERNHARD
分类号	E21B7/20	主分类号	E21B7/20
代理机构		代理人
主权项
地址

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