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经营范围
发明名称
Stinger for underreaming device
摘要
申请公布号
GB2423546(A)
申请公布日期
2006.08.30
申请号
GB20060009714
申请日期
2003.02.10
申请人
SMITH INTERNATIONAL INC
发明人
CHARLES H. DEWEY;WEI XU
分类号
E21B10/26;E21B10/32;E21B17/10
主分类号
E21B10/26
代理机构
代理人
主权项
地址
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