Non-destructive testing of steel tubes - Part 12: Magnetic particle inspection of seamless and welded ferromagnetic steel tubes for the detection of surface imperfections; English version of DIN EN 10246-12
钢管无损检测.第12部分:表面缺陷检测用无缝和焊接铁磁钢管的磁粉检验;德文版EN 10246-12:2000