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发明名称
Improved nozzle bore for pdc bits
摘要
申请公布号
GB0722351(D0)
申请公布日期
2007.12.27
申请号
GB20070022351
申请日期
2006.08.29
申请人
SMITH INTERNATIONAL INC
发明人
分类号
主分类号
代理机构
代理人
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