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发明名称
Downhole pump drive head assembly with hydrodynamic retarder
摘要
申请公布号
GB2299849(A)
申请公布日期
1996.10.16
申请号
GB19950007396
申请日期
1995.04.10
申请人
* MONO PUMPS LIMITED
发明人
IAIN RUSSELL * BELCHER
分类号
E21B43/00;E21B43/12;F16D57/04;(IPC1-7):F16D57/00;E21B3/00
主分类号
E21B43/00
代理机构
代理人
主权项
地址
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