Ключевые слова:
Ultrasonic testing, Non-destructive testing, Reflection, Steels, Alloy steels, Unalloyed steels, Sheet materials, Strips, Dimensions, Thickness, Grades (quality), Classification systems, Inspection, Acceptance (approval), Test equipment, Test specimens, Specimen preparation, Testing conditions, Defects, Internal, Adjustment, Frequencies, Surface treatment, Edge, Calibration, Area, Density measurement