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发明名称
Rotary percussive drill bit
摘要
申请公布号
GB2302664(A)
申请公布日期
1997.01.29
申请号
GB19950013137
申请日期
1995.06.28
申请人
* ARMEG LIMITED
发明人
ANTHONY ROY * SMALL
分类号
E21B10/58;(IPC1-7):B23B51/02;B25D17/02
主分类号
E21B10/58
代理机构
代理人
主权项
地址
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