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ISO/IEC 646
ISO/IEC 646是国际标准化组织（ISO）和国际电工委员会（IEC）制订的标准，在1972年制订。它是一个 7-位元字符的字集，来自数个国家标准，最主要来自美国的 ASCII（美国信息互换标准代码）。ISO 646 除了英语字母和数字的部分，为
https://eng.fontke.com/article/2424/
