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Application filed by Frantisek Petrik, Kvetoslav Vyjidacek, Jaroslav Sitta, Stanislav Kalous, Karel Kopka, Jan Frank, Karel NovakfiledCriticalFrantisek Petrik
Priority to CS579075ApriorityCriticalpatent/CS192058B1/cs
Publication of CS192058B1publicationCriticalpatent/CS192058B1/cs