- Data represented by the punching of single holes in each column of a field on a punched card. For example, alphabetic characters and other symbols may be punched as two holes per column.; 通过在卡片上某个字段中的各列穿单孔来表示数据的一种方法。字母字符和其它符号可能要 在各列上穿双孔。
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Last modified time:Sun, 17 Aug 2025 00:29:56 GMT