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Application filed by Jan Formanek, Gorgon Oldrich, Stepanova JanafiledCriticalJan Formanek
Priority to CS832375ApriorityCriticalpatent/CS238667B1/en
Publication of CS237583A1publicationCriticalpatent/CS237583A1/en
Publication of CS238667B1publicationCriticalpatent/CS238667B1/en