GB/T 17960-2000

Information technology--Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 tracks on each side--GB type 303

信息技术 数据交换用90 mm改进调频制记录的位密度为31 831磁通翻转/弧度、每面80磁道的软磁盘 GB 303型