DIN 66288 : 1988被替代
INFORMATION PROCESSING - FLEXIBLE DISK CARTRIDGE 90 USABLE ON TWO SIDES - METHOD OF RECORDING AND FORMATTING USING MODIFIED FREQUENCY MODULATION RECORDING WITH 7958 FLUX TRANSITIONS PER RAD, 80 TRACKS PER SIDE
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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