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发明名称
SUBSURFACE WELL VALVE
摘要
申请公布号
GB2129033(A)
申请公布日期
1984.05.10
申请号
GB19830011204
申请日期
1983.04.25
申请人
* OTIS ENGINEERING CORPORATION
发明人
TIMOTHY JOHN * NOACK;LESTER CAMPBELL * RATHIE
分类号
E21B34/00;E21B34/04;(IPC1-7):E21B34/10
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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