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GB/T 12057-1989 standard english preview version PDF file download

GB Standard Code GB/T 12057-1989
Standard Category China National Standards
GB Standard English Title General purpose 37-position and 9-position interface for data terminal equipment and data circuit-terminating equipment employing serial binary data interchange
GB Standard Chinese Title 使用串行二进制数据交换的数据终端设备和数据电路终接设备之间的通用37插针和9 插针接口
Chinese Version Price $15 USD per 50 pages
English Translation Price About $15  per 1 page; Inquire us for detail price

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