EN 10246-7:1996 钢管的无损检验.第7部分:纵向缺陷探测用无缝焊接钢管(埋弧焊除外)的自动全周界超声波检验
Non-Destructive Testing of Steel Tubes - Part 7: Automatic Full Peripheral Ultrasonic Testing of Seamless and Welded (Except Submerged Arc Welded) Steel Tubes for the Detection of Longitudinal Imperfections