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Application filed by Karel Vystil, Vladimir Kuda, Josef Ing Joch, Vaclav Ing Jadrny, Dvoracek Jan, Jiri Ing Cernocky, Josef MartinecfiledCriticalKarel Vystil
Priority to CS866780ApriorityCriticalpatent/CS257084B1/en
Publication of CS678086A1publicationCriticalpatent/CS678086A1/en
Publication of CS257084B1publicationCriticalpatent/CS257084B1/en