Drill rod assembly for rock drilling operations,申请号GB19510014785-传众专利搜索

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发明名称	Drill rod assembly for rock drilling operations
摘要
申请公布号	GB690531(A)	申请公布日期	1953.04.22
申请号	GB19510014785	申请日期	1951.06.21
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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