Ключевые слова: angle probe, calibration, crack, defect, detect, dimension, education, equipment, flaw, gate, gauge, industry, inspection, inspector, internal, internal defect, material velocity, measurement, metrology, non destructive test, outside, peak, plate, probe, pulse, quality assurance, quality control, scan, signal, sound, sound velocity, surface plate, technology, ultrasonic, ultrasound, uncertainty, verification, welding, weldment,