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Application filed by Zikan Viktor, Vaclav Ing Vosatka, Danek JaroslavfiledCriticalZikan Viktor
Priority to CS867563ApriorityCriticalpatent/CS255242B1/en
Publication of CS756386A1publicationCriticalpatent/CS756386A1/en
Publication of CS255242B1publicationCriticalpatent/CS255242B1/en