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发明名称
Means for flowing wells
摘要
申请公布号
US2331550(A)
申请公布日期
1943.10.12
申请号
US19400323417
申请日期
1940.03.11
申请人
FRITZ W. GLITSCH & SONS
发明人
GLITSCH HANS C.
分类号
F04F1/18
主分类号
F04F1/18
代理机构
代理人
主权项
地址
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