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Application filed by Karel Ing Cerny, Vitezslav Ing Jirousek, Jozef Ing HogelfiledCriticalKarel Ing Cerny
Priority to CS815942ApriorityCriticalpatent/CS231418B1/en
Publication of CS594281A1publicationCriticalpatent/CS594281A1/en
Publication of CS231418B1publicationCriticalpatent/CS231418B1/en