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Application filed by Bohuslav Ing Michna, Jaroslav TizekfiledCriticalBohuslav Ing Michna
Priority to CS873431ApriorityCriticalpatent/CS262017B1/en
Publication of CS343187A1publicationCriticalpatent/CS343187A1/en
Publication of CS262017B1publicationCriticalpatent/CS262017B1/en