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Publication date
Application filed by Ladislav Trubac, Josef LebduskafiledCriticalLadislav Trubac
Priority to CS89583ApriorityCriticalpatent/CS272033B1/en
Publication of CS58389A1publicationCriticalpatent/CS58389A1/en
Publication of CS272033B1publicationCriticalpatent/CS272033B1/en