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发明名称
PERCUSSION DRILLING IMPROVEMENTS
摘要
申请公布号
EP0692061(B1)
申请公布日期
2002.08.28
申请号
EP19940911780
申请日期
1994.04.05
申请人
SDS PTY. LTD.
发明人
MCINNES, MALCOLM, BICKNELL
分类号
E21B4/14;(IPC1-7):E21B4/14;B25D17/06
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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