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Application filed by Jaroslav Sklenar, Oldrich Ing SmetanafiledCriticalJaroslav Sklenar
Priority to CS852926ApriorityCriticalpatent/CS243543B1/en
Publication of CS292685A1publicationCriticalpatent/CS292685A1/en
Publication of CS243543B1publicationCriticalpatent/CS243543B1/en