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Application filed by Ladislav Jirousek, Stanislav Sevcik, Nehoslav Langer, Oldrich TomesfiledCriticalLadislav Jirousek
Priority to CS872915ApriorityCriticalpatent/CS259648B1/en
Publication of CS291587A1publicationCriticalpatent/CS291587A1/en
Publication of CS259648B1publicationCriticalpatent/CS259648B1/en