upc码(商品条码),code39码(可表示数字和字母,在管理领域应用最广)
upc-a码与upc-e码编码规则的区别
upc 条码
upc码(universal product code)是最早大规模应用的条码,其特性是一种
upc和ean两种商品条码的发展史介绍
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