DIN EN ISO 22825-2012 焊缝无损检测.超声波试验.奥氏体刚和镍合金焊缝试验(ISO 22825-2012).德文版本EN ISO 22825-2012
Non-destructive testing of welds - Ultrasonic testing - Testing of welds in austenitic steels and nickel-based alloys (ISO 22825:2012); German version EN ISO 22825:2012