Non-destructive testing; ultrasonic method of testing claddings produced by welding, rolling and explosionEssais non destructifs; la procédure d'ultra-son pour examiner les placages produit par soudage, laminage et explosion
DIN 54123:1980 history
1980DIN 54123:1980 Non-destructive Test; Ultrasonic Method of Testing Claddings, Produced by Welding, Rolling and Explosion