BS 7081-1-1989
使用IMFM以252次磁通变换/mm(6400次磁通变换/in)速率录制的数据交换用6.30mm(0.25in)磁带盒的使用和制造指南.机械、物理和磁性能
Guide to construction and use of 6.30 mm (0.25 in) magnetic tape cartridge using IMFM for data interchange, recording at 252 ftpmm (6400 ftpi). Mechanical, physical and magnetic properties