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发明名称
Anordning for oppspenning av stigerör
摘要
申请公布号
NO20015704(D0)
申请公布日期
2001.11.22
申请号
NO20010005704
申请日期
2001.11.22
申请人
OLSEN, FRED
发明人
OEIGARDEN, HANS;OLSEN, FRED
分类号
E21B;(IPC1-7):E21B
主分类号
E21B
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代理人
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