Down-the-hole drill drive coupling,申请号AU20120203653-传众专利搜索

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发明名称	Down-the-hole drill drive coupling
摘要
申请公布号	AU2012203653(C1)	申请公布日期	2012.11.29
申请号	AU20120203653	申请日期	2012.06.22
申请人	CENTER ROCK INC.	发明人	LYON, LELAND H.
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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