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Application filed by Fridrich Ing Juras, Jaroslav KoumarfiledCriticalFridrich Ing Juras
Priority to CS867216ApriorityCriticalpatent/CS259105B1/en
Publication of CS721686A1publicationCriticalpatent/CS721686A1/en
Publication of CS259105B1publicationCriticalpatent/CS259105B1/en