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发明名称
TOOL ASSEMBLY COMPRISING A PERCUSSION BIT AND A DRILL PIPE
摘要
申请公布号
EP0149207(A3)
申请公布日期
1987.10.07
申请号
EP19840116067
申请日期
1984.12.21
申请人
FRIED. KRUPP GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
发明人
POERSCHKE, WILHELM;RAUEN, ULRICH, DIPL.-ING.
分类号
E21B17/046;(IPC1-7):E21B17/046
主分类号
E21B17/046
代理机构
代理人
主权项
地址
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