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发明名称
Differential pressure adapter for automatic cycle well control
摘要
申请公布号
US3266574(A)
申请公布日期
1966.08.16
申请号
US19630328006
申请日期
1963.12.04
申请人
GANDY GARY R
发明人
GANDY GARY R.
分类号
E21B43/12
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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