DIN EN 60404-4:2009 磁性材料.第4部分:软磁材料直流磁性能的测量方法(IEC 60404-4-1995 + A1-2000 + A2-2008).德文版本EN 60404-4-1997 + A1-2002 + A2-2008
Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of magnetically soft materials (IEC 60404-4:1995 + A1:2000 + A2:2008); German version EN 60404-4:1997 + A1:2002 + A2:2008