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发明名称
Magnetorheological fluid apparatus, especially adapted for use in a steerable drill string, and method of using same
摘要
申请公布号
GB2373527(B)
申请公布日期
2004.02.11
申请号
GB20020009760
申请日期
2000.10.02
申请人
* APS TECHNOLOGY INC
发明人
MARK ELLSWORTH * WASSELL
分类号
E21B7/06;E21B7/08;(IPC1-7):E21B7/06
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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