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发明名称
Pumping rig
摘要
申请公布号
US2157628(A)
申请公布日期
1939.05.09
申请号
US19370120049
申请日期
1937.01.11
申请人
J. F. DARBY
发明人
PORTER ALBERT N.
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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