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发明名称
Apparatus for operating wells
摘要
申请公布号
US2096843(A)
申请公布日期
1937.10.26
申请号
US19330680092
申请日期
1933.07.12
申请人
THE PURE OIL COMPANY
发明人
CARR RICHARD H.;COVELL KENNETH 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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