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发明名称
Oil well swab
摘要
申请公布号
US3150607(A)
申请公布日期
1964.09.29
申请号
US19620225310
申请日期
1962.09.21
申请人
RILEY DAVID H
发明人
RILEY DAVID H.
分类号
E21B37/10
主分类号
E21B37/10
代理机构
代理人
主权项
地址
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