The product keycode is an alphanumeric string that has a length of 19 digits or characters 产品密钥是字母数字的字符串,长度为19位数字或字符。
Recommended practice for alphanumeric computer - output microforms - operational practices for inspection and quality control 字母数字的计算机输出缩微胶片推荐惯例.检验和质量控制操作惯例
An operation that uses word sort rules performs a culture - sensitive comparison wherein certain nonalphanumeric unicode characters might have special weights assigned to them 使用字词排序规则的操作执行一个区域敏感比较,在这个比较中可能会为非字母数字的unicode字符分配特殊权重。