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发明名称
Surface controlled combination pump and gas lift
摘要
申请公布号
US2338767(A)
申请公布日期
1944.01.11
申请号
US19410422833
申请日期
1941.12.13
申请人
BEN H. JOHNSTON;EARL L. LESTER, SR.
发明人
HUMASON GRANVILLE A.
分类号
F04B47/04
主分类号
F04B47/04
代理机构
代理人
主权项
地址
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