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发明名称
BALL VALVE ACTUATING MEMBER WITH FORCE MULTIPLIER.
摘要
申请公布号
EP0470972(B1)
申请公布日期
1994.12.14
申请号
EP19900906284
申请日期
1990.04.17
申请人
EXPLORATION AND PRODUCTION SERVICES (NORTH SEA) LIMITED
发明人
EDWARDS, JEFFREY, CHARLES;JOHNS, RAY;BUCHANAN, ROBERT, DONALD
分类号
E21B23/00;E21B34/00;E21B34/10;F16K5/06;(IPC1-7):F16K5/06
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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