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发明名称
HEATING SYSTEM FOR RATHOLE OIL WELL
摘要
申请公布号
EP0294809(A3)
申请公布日期
1989.11.15
申请号
EP19880109210
申请日期
1988.06.09
申请人
ORS DEVELOPMENT CORPORATION
发明人
BRIDGES, JACK E.;YOUNG, VINCENT
分类号
E21B17/00;E21B36/04;(IPC1-7):E21B43/24
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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