Non-destructive testing - Characterization and verification of ultrasonic test equipment - Part 1: Instruments (ISO 22232-1:2020); German version EN ISO 22232-1:2020— 51 стр.
Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 1: Instruments (ISO/DIS 22232-1:2018); German and English version prEN ISO 22232-1:2018