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Application filed by Jaroslav Ing Hanak, Vaclavek Miroslav, Bartos Otakar, Jan Ing Kolmacka, Alois Ing ChvalafiledCriticalJaroslav Ing Hanak
Priority to CS872709ApriorityCriticalpatent/CS259647B1/en
Publication of CS270987A1publicationCriticalpatent/CS270987A1/en
Publication of CS259647B1publicationCriticalpatent/CS259647B1/en