TS 2731-1977 INFORMATION PROCESSING 9 - TRACK 12 7 mm (0 5 in) WIDE MAGNETIC TAPE FOR INFORMATION INTERCHANGE RECORDED AT 32 mm (88 rpi)《信息处理 以32毫米(88rpi)记录的信息交换用9磁道12 7毫米宽磁带》.pdf

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