Non-destructive testing of steel tubes - Part 9: Automated ultrasonic testing for the detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes - Amendment 1: Change acceptance criteria (ISO 10893-9:2011/Amd 1:2020)
钢管无损检测第9部分:焊接钢管制造用带材/板材层流缺陷检测的自动超声波检测修改件1:变更验收标准