DIN EN 61120-4:1993 数字录音机.演播室用6.3mm磁带带盘系统.第4部分:磁带性能.定义和测量方法
Digital audio tape recorder; reel-to-reel system using 6,3 mm magnetic tape for professional use; part 4: magnetic tape properties; definitions and methods of measurement (IEC 61120-4:1992); German version EN 61120-4:1992