Twisted Percussion Drill Rod and Manufacturing Method,申请号CA19912096838-传众专利搜索

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发明名称	Twisted Percussion Drill Rod and Manufacturing Method
摘要
申请公布号	CA2096838(A1)	申请公布日期	1992.05.27
申请号	CA19912096838	申请日期	1991.11.20
申请人	ROBINSON, STANLEY D.	发明人	ROBINSON, STANLEY D.
分类号	B21D11/14;E21B17/22;(IPC1-7):B21D11/14;E21B17/00	主分类号	B21D11/14
代理机构		代理人
主权项
地址

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