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Priority claimed from DE19792900683external-prioritypatent/DE2900683C2/de
Application filed by Hermann Fehling Tief- Und KulturbaufiledCriticalHermann Fehling Tief- Und Kulturbau
Priority claimed from EP80100377Aexternal-prioritypatent/EP0032961B1/de
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Publication of ATE4533T1publicationCriticalpatent/ATE4533T1/de