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发明名称
A pressure counter - balancing apparatus for a downhole pump
摘要
申请公布号
GB2414773(A)
申请公布日期
2005.12.07
申请号
GB20050016053
申请日期
2002.06.13
申请人
* WEATHERFORD/LAMB INC.
发明人
WILLIAM F * HOWARD
分类号
F04B11/00;F04B17/04;F04B47/02;F04B47/06;F04B47/14;(IPC1-7):F04B47/14
主分类号
F04B11/00
代理机构
代理人
主权项
地址
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