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发明名称
Core cutting rock bit
摘要
申请公布号
GB2281330(A)
申请公布日期
1995.03.01
申请号
GB19940015788
申请日期
1994.08.04
申请人
* SMITH INTERNATIONAL INC
发明人
ROGER P * JOHNS;GARY * PORTWOOD;GILBERT S * TYNER;CHARLES R * MUREN
分类号
E21B10/04;E21B10/06;E21B10/16;(IPC1-7):E21B10/04
主分类号
E21B10/04
代理机构
代理人
主权项
地址
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