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Application filed by Josef Bartos, Pavel Ing Seidl, Mladek MilosfiledCriticalJosef Bartos
Priority to CS835439ApriorityCriticalpatent/CS239015B1/en
Publication of CS543983A1publicationCriticalpatent/CS543983A1/en
Publication of CS239015B1publicationCriticalpatent/CS239015B1/en