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发明名称
Bottom hole hydropneumatic power unit
摘要
申请公布号
US2251290(A)
申请公布日期
1941.08.05
申请号
US19380217173
申请日期
1938.07.02
申请人
REED WARREN B
发明人
REED WARREN B.
分类号
F04B47/04
主分类号
F04B47/04
代理机构
代理人
主权项
地址
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