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Application filed by Dusan Ing Ockaik, Tibor Ing VinohradskyfiledCriticalDusan Ing Ockaik
Priority to CS878996ApriorityCriticalpatent/CS266973B1/en
Publication of CS899687A1publicationCriticalpatent/CS899687A1/en
Publication of CS266973B1publicationCriticalpatent/CS266973B1/en