Drill steel rod,申请号US19450606900-传众专利搜索

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发明名称	Drill steel rod
摘要
申请公布号	US2424092(A)	申请公布日期	1947.07.15
申请号	US19450606900	申请日期	1945.07.25
申请人	ATLAS STEELS LIMITED	发明人	HAMMOND CHARLES PERCY;CAMERON ALLISTER MCKENZIE
分类号	E21B17/00	主分类号	E21B17/00
代理机构		代理人
主权项
地址

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