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发明名称
Cutting structure for roller cone drill bits
摘要
申请公布号
GB0209906(D0)
申请公布日期
2002.06.05
申请号
GB20020009906
申请日期
2001.06.04
申请人
SMITH INTERNATIONAL INC
发明人
分类号
E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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