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发明名称
Бур дл земл ных работ
摘要
申请公布号
RU35813(U1)
申请公布日期
2004.02.10
申请号
RU20030129402U
申请日期
2003.10.10
申请人
发明人
分类号
E21B7/24
主分类号
E21B7/24
代理机构
代理人
主权项
地址
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