Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO/FDIS 17640:2018); German and English version prEN ISO 17640:2018— 38 стр.
25.160.40 Welded. Including welding position and mechanical and non-destructive testing of welded joints / Сварочные швы. Включая положение шва и механические и неразрушающие испытания сварных соединений
