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发明名称
ВНУТРЕННЯЯ ОСВОБОЖДАЮЩАЯСЯ ТРУБОЛОВКА
摘要
申请公布号
RU43577(U1)
申请公布日期
2005.01.27
申请号
RU20040127770U
申请日期
2004.09.17
申请人
发明人
分类号
E21B31/20
主分类号
E21B31/20
代理机构
代理人
主权项
地址
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