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发明名称
Drill bit
摘要
申请公布号
GB0506555(D0)
申请公布日期
2005.05.04
申请号
GB20050006555
申请日期
2005.03.31
申请人
SMITH INTERNATIONAL INC
发明人
分类号
E21B7/00;E21B10/00;E21B10/16;E21B10/18;E21B17/00;E21B19/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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