Ключевые слова:
Flexible disks, Magnetic disks, Data media, Information exchange, Data processing, Frequency modulation, Data recording, Magnetic recording, Dimensions, Interchangeability, Envelopes, Square shape, Environment (working), Testing conditions, Storage, Thermal expansion, Opacity, Torque, Recording tracks, Performance, Rejects, Thickness measurement, Test equipment, Transmittance, Optical measurement, Width measurement, Recording characteristics