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 GB/T 667-1995  
Chemical reagent--Zinc nitrate hexahydrate

化学试剂 六水合硝酸锌(硝酸锌)
 GB/T 15130.2-1995  
Information processing--Data interchange on 90mm flexible disk cartridges using modified frequency modulation recording at15916 ftprad, on 80 tracks on each side--Part 2:Track format

信息处理 数据交换用90 mm改进调频制记录的位密度为15916磁通翻转/弧度、每面80条磁道的软磁盘 第二部分:磁道格式

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