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发明名称
ANORDNING FOR SPYLING AV EN BOREKRONE.
摘要
申请公布号
NO901537(D0)
申请公布日期
1990.04.04
申请号
NO19900001537
申请日期
1990.04.04
申请人
UNIROC AKTIEBOLAG
发明人
LOEF, STIG UNO
分类号
E21B10/60;E21B7/20;E21B10/38;E21B10/66;E21B21/10;E21B34/12;(IPC1-7):E21B/
主分类号
E21B10/60
代理机构
代理人
主权项
地址
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