00510naa#a2200169#i#450# EN\\bibl\17265 20260313140758.5 1609-3178 20170712b2017####ek#y0engy0150####ca RU NDT Personnel Qualification in the Czech Republic — a New Approach for NDT Special Process Journal article Saint-Petersburg LLC SVEN 2017 2 с. Journal article local Zavadil Zbyněk Zavadil Tomáš zh-szf.ru