字母数字字符集 meaning in English

alphanumeric character set
alphanumeric coded character set

In word processing , a set of alphanumeric characters which convey information
在字(词)处理技术中，传送信息的字母数字字符集。
Alphanumeric character sets for optical recognition - part 1 : character set ocr - a - shapes and dimensions of the printed image
光学识别用字母数字字符集第1部分: ocr - a字符集印刷图象的形状和尺寸
Alphanumeric character sets for optical recognition - part 2 : character set ocr - b - shapes and dimensions of the printed image
光学识别字母数字字符集.第2部分:字符集ocr - b .印刷图像的形状和尺寸
Alphanumeric character sets for optical recognition - part 1 : character set ocr - a - shapes and dimensions of the printed image
光学识别字母数字字符集.第1部分:字符集ocr - a .印刷图像的形状和尺寸
Alphanumeric character sets for optical recognition - part 2 : character set ocr - b - shapes and dimensions of the printed image
光学识别用字母数字字符集第二部分: ocr - b字符集印刷图象的形状和尺寸