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发明名称
Means and method of raising liquid from wells
摘要
申请公布号
US1836873(A)
申请公布日期
1931.12.15
申请号
US19290360344
申请日期
1929.05.04
申请人
HUGHES TOOL COMPANY
发明人
RICKER NORMAN H.
分类号
F04B47/04
主分类号
F04B47/04
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代理人
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