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发明名称
SKJAEREVALSE FOR BORKRONE.
摘要
申请公布号
NO165650(B)
申请公布日期
1990.12.03
申请号
NO19850000587
申请日期
1985.02.15
申请人
HUGHES TOOL CO
发明人
PESSIER RUDOLF CARL OTTO
分类号
E21B;E21B10/28;E21B10/46;(IPC1-7):E21B10/28
主分类号
E21B
代理机构
代理人
主权项
地址
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