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发明名称
Gate valve actuator override mechanism
摘要
申请公布号
GB9906952(D0)
申请公布日期
1999.05.19
申请号
GB19990006952
申请日期
1999.03.25
申请人
FMC CORPORATION
发明人
分类号
E21B34/04;F15B13/10;F15B15/14
主分类号
E21B34/04
代理机构
代理人
主权项
地址
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