Unformatted Flexible Disk Cartridge for Infomation Interchange 90 mm (3.5 in) 5.3 Tracks per mm (135 Tracks per in), General, Physical, and Magnetic Requirements for 7958 BPR Use (formerly ANSI X3.137-1988(R1994))
信息交换用非格式化软磁盘盒每毫米90毫米(3.5英寸)5.3磁道(每英寸135磁道) 7958 BPR使用的一般、物理和磁性要求(原ANSI X3.137-1988(R1994))
Covers one- and two-sided 90-mm (3.5 in)(nominal) flexible disk cartridge for 7958 bits per radian (BPR) use as required to achieve unformatted disk cartridge interchange among disk drives using 80 tracks per side and associated information processing systems.