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经营范围
发明名称
Multiple cylinder, elastic fluid counterbalanced pump jack
摘要
申请公布号
US2902884(A)
申请公布日期
1959.09.08
申请号
US19560593151
申请日期
1956.06.22
申请人
BLACKBURN LUTHER A
发明人
BLACKBURN LUTHER A.
分类号
F04B47/14;F16F15/28
主分类号
F04B47/14
代理机构
代理人
主权项
地址
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