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经营范围
发明名称
Plunger lift
摘要
申请公布号
US2699121(A)
申请公布日期
1955.01.11
申请号
US19490106579
申请日期
1949.07.25
申请人
THE NATIONAL SUPPLY COMPANY
发明人
KNOX DONALD G.
分类号
F04B47/12
主分类号
F04B47/12
代理机构
代理人
主权项
地址
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