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Application filed by Magyar Frantisek, Juraj Doc Ing Csc OetterfiledCriticalMagyar Frantisek
Priority to CS844530ApriorityCriticalpatent/CS257802B1/en
Publication of CS453084A1publicationCriticalpatent/CS453084A1/en
Publication of CS257802B1publicationCriticalpatent/CS257802B1/en