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发明名称
Oil well sand pumps
摘要
申请公布号
US2915987(A)
申请公布日期
1959.12.08
申请号
US19580728324
申请日期
1958.04.14
申请人
FREDERICK MCMAHON WILLIAM
发明人
MCMAHON WILLIAM FREDERICK
分类号
E21B37/00
主分类号
E21B37/00
代理机构
代理人
主权项
地址
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