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发明名称
Sentreringsanordning
摘要
申请公布号
NO304897(B1)
申请公布日期
1999.03.01
申请号
NO19930002943
申请日期
1993.08.19
申请人
ZWART, KLAAS
发明人
ZWART, KLAAS
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
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代理人
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