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发明名称
Trykkforsterker (II)
摘要
申请公布号
NO943858(D0)
申请公布日期
1994.10.12
申请号
NO19940003858
申请日期
1994.10.12
申请人
NORSKE STATS OLJESELSKAP AS, DEN
发明人
NILSEN, NILS INGE
分类号
E21B7/18;E21B21/00;(IPC1-7):E21B
主分类号
E21B7/18
代理机构
代理人
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地址
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