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发明名称
Well pumping device
摘要
申请公布号
US2018700(A)
申请公布日期
1935.10.29
申请号
US19340720925
申请日期
1934.04.17
申请人
STANDARD OIL DEVELOPMENT COMPANY
发明人
BLAU LUDWIG W.
分类号
F04B47/00
主分类号
F04B47/00
代理机构
代理人
主权项
地址
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