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经营范围
发明名称
Concentric gas lift valves
摘要
申请公布号
US3342202(A)
申请公布日期
1967.09.19
申请号
US19640402831
申请日期
1964.10.09
申请人
MCMURRY;KNUD I. BRUUN
发明人
MCMURRY EVERETT D.;ABERCROMBIE BOLLING A.
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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