Jonction de tubes de forage,申请号FRD51683-传众专利搜索

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法人/股东/高管

发明名称	Jonction de tubes de forage
摘要
申请公布号	FR51683(E)	申请公布日期	1943.03.19
申请号	FRD51683	申请日期	1941.07.12
申请人	DEUTSCHE ROHRENWERKE A.G.	发明人
分类号	E21B17/042;F16L15/00	主分类号	E21B17/042
代理机构		代理人
主权项
地址

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