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发明名称
НАГРЕВАТЕЛЬ ДЛЯ НЕФТЯНОЙ СКВАЖИНЫ
摘要
申请公布号
RU37765(U1)
申请公布日期
2004.05.10
申请号
RU20030134465U
申请日期
2003.11.26
申请人
发明人
分类号
E21B36/04;(IPC1-7):E21B36/04
主分类号
E21B36/04
代理机构
代理人
主权项
地址
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