GOST 20731-1986 12 7 mm wide 9-track magnetic tapes recorded at 63 bit mm phase encoded Specifications《用相位代码的12 7mm宽带9个记录轨迹的密度为63bit mm的磁带 技术要求》.pdf

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GOST 20731-1986 12 7 mm wide 9-track magnetic tapes recorded at 63 bit mm phase encoded Specifications《用相位代码的12 7mm宽带9个记录轨迹的密度为63bit mm的磁带 技术要求》.pdf_第1页
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