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发明名称	DOWN HOLE HAMMER ASSEMBLY
摘要
申请公布号	EP0832344(A4)	申请公布日期	2001.09.26
申请号	EP19960917278	申请日期	1996.06.14
申请人	REAR, IAN GRAEME	发明人	REAR, IAN GRAEME
分类号	E21B7/20;E21B10/38;E21B10/56;E21B10/64;E21B17/02;E21B17/046;E21B17/07;E21B21/12;(IPC1-7):E21B1/04;E21B4/14	主分类号	E21B7/20
代理机构		代理人
主权项
地址

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