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Application filed by Josef Lebduska, Ladislav Trubac, Vencl Lubomir, Cernik JirifiledCriticalJosef Lebduska
Priority to CS886442ApriorityCriticalpatent/CS270748B1/en
Publication of CS644288A1publicationCriticalpatent/CS644288A1/en
Publication of CS270748B1publicationCriticalpatent/CS270748B1/en