ANSI X3.179-1990
信息系统.接触启动/停止金属膜片存储盘.外径为95mm(0.3740英寸)和内径为25mm(0.984英寸),厚度为1.27mm(0.050英寸),83333传输通量/道
Information Systems - Contact Start-Stop Metallic Thin-Film Storage Disk - 83 333 Flux Transitions per Track 95-mm (3.740-in) Outer Diameter and 25-mm (0.984-in) Inner Diameter and 1.27-mm (0.050-in) Thickness