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Application filed by Zdenek Mlejnek, Stanislav CermakfiledCriticalZdenek Mlejnek
Priority to CS823891ApriorityCriticalpatent/CS239513B1/en
Publication of CS389182A1publicationCriticalpatent/CS389182A1/en
Publication of CS239513B1publicationCriticalpatent/CS239513B1/en