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摘要
申请公布号
RU30826(U1)
申请公布日期
2003.07.10
申请号
RU20030108029U
申请日期
2003.03.26
申请人
Абрамов Александр Федорович
发明人
Абрамов А.Ф.
分类号
E21B33/03
主分类号
E21B33/03
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