EN 27487-2:1989 信息处理.数据交换用130mm(5.25 in)双频制记录式密度为7958 ftprad的1.9 tpmm(48 tpi)双面软盘.第2部分:磁道格式A
Information Processing Data Interchange on 130 mm (5.25in) Flexible Disk Cartridges Using Modified Frequency Modulation Recording at 7 958 ftprad, 19 tpmm (48tpi) on Both Sides Part 2: Track Format A