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发明名称
Engineered enhanced inserts for rock drilling bits
摘要
申请公布号
GB9903066(D0)
申请公布日期
1999.03.31
申请号
GB19990003066
申请日期
1999.02.12
申请人
SMITH INTERNATIONAL INCORPORATED
发明人
分类号
E21B10/56;E21B17/10
主分类号
E21B10/56
代理机构
代理人
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