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Priority claimed from DE19702020693external-prioritypatent/DE2020693C/de
Application filed by Schmidt Erwepa MaschffiledCriticalSchmidt Erwepa Maschf
Publication of FI51517BpublicationCriticalpatent/FI51517B/fi
Application grantedgrantedCritical
Publication of FI51517CpublicationCriticalpatent/FI51517C/fi