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