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发明名称
DEVICE FOR SINKING OIL, GAS OR GEOTHERMAL WELLS
摘要
申请公布号
RU2062861(C1)
申请公布日期
1996.06.27
申请号
RU19930058191
申请日期
1992.04.03
申请人
ANDRE LERUA
发明人
ANDRE LERUA
分类号
E21B4/00;E21B4/02;E21B4/20;E21B7/28;E21B44/00;(IPC1-7):E21B4/02
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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