14 صفحه pdf
BS EN 583-1:1999
Non-destructive testing-Ultrasonic examination
Part 1: General principles
BS EN 583-1:1999-Non-destructive testing-Ultrasonic examination, Part 1
14 صفحه pdf
BS EN 583-1:1999
Non-destructive testing-Ultrasonic examination
Part 1: General principles