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发明名称
Rod guide
摘要
申请公布号
US2389906(A)
申请公布日期
1945.11.27
申请号
US19440520994
申请日期
1944.02.03
申请人
HEARD WILLIS J
发明人
HEARD WILLIS J.
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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