DIN EN 60404-2:1998 磁性材料.第2部分:用爱普斯坦方框测量电工薄钢板和钢带材的磁性能的方法
Magnetic materials - Part 2: Methods of measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame (IEC 60404-2:1996); German version EN 60404-2:1998