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Application filed by Stanislav Kolouch, Rudolf Melichar, Rudolf NemecekfiledCriticalStanislav Kolouch
Priority to CS851555ApriorityCriticalpatent/CS251174B1/en
Publication of CS155585A1publicationCriticalpatent/CS155585A1/en
Publication of CS251174B1publicationCriticalpatent/CS251174B1/en