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Application filed by Vasil S Sgurev, Stojan S Ogorelkov, Krasimir P Colev, Atanas D Venkov, Nikolajj I OgnjanovfiledCriticalVasil S Sgurev
Priority to BG7702386ApriorityCriticalpatent/BG42828A1/en
Publication of BG42828A1publicationCriticalpatent/BG42828A1/en