COUPLING PIECE FOR USE AT SIMULTANEOUS EARTH AND/OR ROCK DRILLING WITH AN UPPER ROTARY PERCUSSION DEVICE AND A LOWER PERCUSSION DEVICE,申请号EP19970936903-传众专利搜索

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发明名称	COUPLING PIECE FOR USE AT SIMULTANEOUS EARTH AND/OR ROCK DRILLING WITH AN UPPER ROTARY PERCUSSION DEVICE AND A LOWER PERCUSSION DEVICE
摘要
申请公布号	EP0927294(A1)	申请公布日期	1999.07.07
申请号	EP19970936903	申请日期	1997.08.25
申请人	ATLAS COPCO CRAELIUS AB	发明人	BORG, TOMAS
分类号	E21B4/20;E21B6/00;E21B17/03;E21B19/086;E21B21/02;E21B44/00;(IPC1-7):E21B6/00	主分类号	E21B4/20
代理机构		代理人
主权项
地址

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