TY JOUR TI Testing of Radiographic Films to Determine Their Applicability for NDT of Aviation Technology Products KW X-ray film KW sensitometric characteristics KW radiation sensitivity KW normal gradient KW resolution limit KW characteristic curve JO NDT World AU Krupnina , O.. AU Demidov , A.. AU Stepanov , A.. AU Kosarina, E.I. AU Turbin , E.. PY 2016 IS 19 PB LLC SVEN