Ключевые слова:
Radiographic testing, Non-destructive testing, Radiography, Welded joints, Fusion welding, Grades (quality), Specimen preparation, Test equipment, X-ray apparatus, X-rays, Gamma-ray apparatus, Gamma-radiation, Radiographic film, Intensifying screens, Thickness, Photographic images, Safety measures, Optical density, Wires, Pipes, Pressure vessels, Boilers