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Application filed by Jan Ing Culka, Jaroslav Ing ZoubekfiledCriticalJan Ing Culka
Priority to CS874870ApriorityCriticalpatent/CS268015B1/cs
Publication of CS487087A1publicationCriticalpatent/CS487087A1/cs
Publication of CS268015B1publicationCriticalpatent/CS268015B1/cs