00517naa#a2200157#i#4500001001500000005001700015011001400032100004100046102000700087200015100094210003700245215001100282608002700293700002400320856001500344EN\\bibl\3964020241012040252.6##a1609-3178##a20201002b2020####ek#y0engy0150####ca##aRU1#aSensitivity and Amplitude Measured Characteristics of the Defect. Review of Changes in Rail Flaw Detection over a Quarter CenturyeJournal article1#aSaint-PetersburgcLLC SVENd2020##a11 с.##aJournal article2local#1aMolotkovgSergey L.4#anaukaru.ru