Non-destructive testing of steel tubes - Part 4: Liquid penetrant inspection of seamless and welded steel tubes for the detection of surface imperfections (ISO 10893-4:2011)
钢管无损检测.第4部分:表面缺陷检测用无缝钢管和焊接钢管的液体渗透检验(ISO 10893-4-2011);德文版EN ISO 10893-4:2011