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发明名称
Free piston pump
摘要
申请公布号
US2884861(A)
申请公布日期
1959.05.05
申请号
US19570650438
申请日期
1957.04.03
申请人
PAN AMERICAN PETROLEUM CORPORATION
发明人
VINCENT RENIC P.;JENNINGS EARL R.
分类号
E21B43/12
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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