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发明名称
Drill bit
摘要
申请公布号
GB2330163(B)
申请公布日期
2002.03.13
申请号
GB19980022204
申请日期
1998.10.12
申请人
* SMITH INTERNATIONAL INC
发明人
QUAN VAN * NGUYEN
分类号
B05B15/06;E21B10/18;E21B10/60;E21B10/61;E21B41/00;(IPC1-7):E21B10/18
主分类号
B05B15/06
代理机构
代理人
主权项
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