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Publication date
Application filed by Bohumil Janosek, Zdenek CisarfiledCriticalBohumil Janosek
Priority to CS867249ApriorityCriticalpatent/CS263425B1/en
Publication of CS724986A1publicationCriticalpatent/CS724986A1/en
Publication of CS263425B1publicationCriticalpatent/CS263425B1/en