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Application filed by Karel Burda, Vaclav Andla, Jaroslav ChromcakfiledCriticalKarel Burda
Priority to CS886331ApriorityCriticalpatent/CS268611B1/en
Publication of CS633188A1publicationCriticalpatent/CS633188A1/en
Publication of CS268611B1publicationCriticalpatent/CS268611B1/en