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发明名称
Oil well pump
摘要
申请公布号
US2420151(A)
申请公布日期
1947.05.06
申请号
US19450584430
申请日期
1945.03.23
申请人
EMSCO DERRICK & EQUIPMENT COMPANY
发明人
RENOUF RALPH R.;MASON FRANK E.
分类号
F04B15/02;F04B47/00
主分类号
F04B15/02
代理机构
代理人
主权项
地址
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