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发明名称
Means for flowing wells
摘要
申请公布号
US2188668(A)
申请公布日期
1940.01.30
申请号
US19360071669
申请日期
1936.03.30
申请人
THE GUIBERSON CORPORATION
发明人
THAHELD FERI A.
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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