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发明名称
Oil well pump plunger assembly
摘要
申请公布号
US2862457(A)
申请公布日期
1958.12.02
申请号
US19560581196
申请日期
1956.04.27
申请人
WILLIAMS ROY C
发明人
WILLIAMS ROY C.
分类号
F04B47/00;F04B53/14
主分类号
F04B47/00
代理机构
代理人
主权项
地址
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