代打印upc-12 ean-13条形码标签纸code128b code39 itf14 ucc条码
通用商品代码 (upc)universal product code,很多新手卖家第一次听到
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)
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upc码(universal product code)是最早大规模应用的条码,其特性是一种
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