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Publication date
Application filed by Ladislav Trubac, Josef LebduskafiledCriticalLadislav Trubac
Priority to CS89581ApriorityCriticalpatent/CS272031B1/en
Publication of CS58189A1publicationCriticalpatent/CS58189A1/en
Publication of CS272031B1publicationCriticalpatent/CS272031B1/en