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Retiffy certificate RET6MH issued to Калоян Узунов from template CCT From Gabrield with values,url:www.retiffy.com,duration:4 часа,template:CCT From Gabrield,dates:2.12.2015,name:Калоян Узунов,school:СОУ "П.Р.Славейков", Трявна,position:учител ИТ,course:Инструменти за привлекателно образование