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发明名称
ROCK DRILLING DEVICE AND A DRILL STEM FOR SAID DEVICE
摘要
申请公布号
EP0198809(A3)
申请公布日期
1988.08.31
申请号
EP19860850121
申请日期
1986.04.10
申请人
ATLAS COPCO AKTIEBOLAG
发明人
ANDERSSON, KURT
分类号
B25D17/06;E21B17/042;F16L15/00;(IPC1-7):E21B17/042;E21B17/00
主分类号
B25D17/06
代理机构
代理人
主权项
地址
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