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发明名称
An earth-boring bit
摘要
申请公布号
GB0412668(D0)
申请公布日期
2004.07.07
申请号
GB20040012668
申请日期
2001.05.18
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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