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发明名称
DRUCKROHRSTRANG ZUM KONTINUIERLICHEN SCHMELZBOHREN FÜR TIEFBOHRUNGEN SOWIE VERFAHREN UND VORRICHTUNG ZU DESSEN HERSTELLEN, VORTREIBEN UND ABBRECHEN
摘要
申请公布号
AT139822(T)
申请公布日期
1996.07.15
申请号
AT19900906112T
申请日期
1990.05.03
申请人
COMPISA AG
发明人
FOPPE, WERNER
分类号
E21B7/10;E21B7/14;E21B17/10;E21B17/12;E21B17/20;E21B19/22;(IPC1-7):E21B17/20;E21B17/18
主分类号
E21B7/10
代理机构
代理人
主权项
地址
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