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Application filed by Karel Burda, Vladimir Zurovec, Jaroslav TichopadfiledCriticalKarel Burda
Priority to CS858319ApriorityCriticalpatent/CS260438B1/en
Publication of CS831985A1publicationCriticalpatent/CS831985A1/en
Publication of CS260438B1publicationCriticalpatent/CS260438B1/en