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发明名称
Failsafe control system for a subsurface safety valve
摘要
申请公布号
GB9920353(D0)
申请公布日期
1999.11.03
申请号
GB19990020353
申请日期
1999.08.31
申请人
BAKER HUGHES INCORPORATED
发明人
分类号
E21B34/10;E21B34/16
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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