Coupling for drill rod sections,申请号GB19520017534-传众专利搜索

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发明名称	Coupling for drill rod sections
摘要
申请公布号	GB717992(A)	申请公布日期	1954.11.03
申请号	GB19520017534	申请日期	1952.07.11
申请人	SANDVIKENS JERNVERKS AKTIEBOLAG	发明人
分类号	E21B17/046	主分类号	E21B17/046
代理机构		代理人
主权项
地址

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