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发明名称
Drill bit
摘要
申请公布号
GB9822204(D0)
申请公布日期
1998.12.02
申请号
GB19980022204
申请日期
1998.10.12
申请人
SMITH INTERNATIONAL INC
发明人
分类号
B05B15/06;E21B10/18;E21B10/60;E21B10/61;E21B41/00
主分类号
B05B15/06
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代理人
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