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Application filed by Rudolf Benak, Ubomir Ing Bumbal, Rudolf Radic, Jan SickofiledCriticalRudolf Benak
Priority to CS857729ApriorityCriticalpatent/CS252955B1/en
Publication of CS772985A1publicationCriticalpatent/CS772985A1/en
Publication of CS252955B1publicationCriticalpatent/CS252955B1/en