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发明名称
Valve for well pump rods
摘要
申请公布号
US2162151(A)
申请公布日期
1939.06.13
申请号
US19380188161
申请日期
1938.02.01
申请人
JOHN WRANOSKY WILLIAM
发明人
WRANOSKY WILLIAM JOHN
分类号
F04B47/00
主分类号
F04B47/00
代理机构
代理人
主权项
地址
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