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发明名称
Fluid flow control devices and methods for selective actuation of valves and hydraulic drilling tools
摘要
申请公布号
GB0302733(D0)
申请公布日期
2003.03.12
申请号
GB20030002733
申请日期
1999.10.28
申请人
SMITH INTERNATIONAL INC
发明人
分类号
E21B23/00;E21B23/08;E21B34/06;E21B34/10;E21B47/18
主分类号
E21B23/00
代理机构
代理人
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