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发明名称
Pumping unit
摘要
申请公布号
US2539585(A)
申请公布日期
1951.01.30
申请号
US19470747817
申请日期
1947.05.13
申请人
OIL WELL SUPPLY COMPANY
发明人
MAIER AUGUST R.
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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