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Application filed by Josef Lebduska, Ladislav Trubac, Vencl Lubomir, Cernik JirifiledCriticalJosef Lebduska
Priority to CS886441ApriorityCriticalpatent/CS270747B1/en
Publication of CS644188A1publicationCriticalpatent/CS644188A1/en
Publication of CS270747B1publicationCriticalpatent/CS270747B1/en