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INTERNATIONAL JOURNAL "NDT DAYS" ÌÅÆÄÓÍÀÐÎÄÍÎ ÑÏÈÑÀÍÈÅ "ÄÍÈ ÍÀ ÁÅÇÐÀÇÐÓØÈÒÅËÍÈß ÊÎÍÒÐÎË" |
ISSN 2603-4018 (print) 2603-4646 (online) |
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© Bulgarian Society for NDT 1962-2018 |