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Application filed by Bronislav Ing Koch, Karel Ing Tvrdy, Jindrich PindurfiledCriticalBronislav Ing Koch
Priority to CS888547ApriorityCriticalpatent/CS270627B1/en
Publication of CS854788A1publicationCriticalpatent/CS854788A1/en
Publication of CS270627B1publicationCriticalpatent/CS270627B1/en