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发明名称
Oil well pump
摘要
申请公布号
US1811101(A)
申请公布日期
1931.06.23
申请号
US19290355702
申请日期
1929.04.17
申请人
WATKINS INTERMITTING PUMP COMPANY
发明人
WATKINS HAROLD F.
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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