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发明名称
Well control device
摘要
申请公布号
US2373034(A)
申请公布日期
1945.04.03
申请号
US19410409668
申请日期
1941.09.05
申请人
OTIS
发明人
LAIRD HUBERT C.;OTIS HERBERT C.
分类号
E21B34/08
主分类号
E21B34/08
代理机构
代理人
主权项
地址
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