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Application filed by Karel Kos, Vojtech Ing Stritzko, Milos Ing Chalupa, Vitezslav HrubyfiledCriticalKarel Kos
Priority to CS844944ApriorityCriticalpatent/CS251331B1/en
Publication of CS494484A1publicationCriticalpatent/CS494484A1/en
Publication of CS251331B1publicationCriticalpatent/CS251331B1/en