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发明名称
ЗАБОЙНАЯ СЕКЦИЯ УСТРОЙСТВА ДЛЯ БУРЕНИЯ (ВАРИАНТЫ)
摘要
申请公布号
RU42259(U1)
申请公布日期
2004.11.27
申请号
RU20040125022U
申请日期
2004.08.13
申请人
发明人
分类号
E21B7/08;(IPC1-7):E21B7/08
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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