What are upc codes ? what are they and how do i get one 什么是upc代码? ?它们是什么?我如何能得到?
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Proofreading artwork to confirm accuracy of photos , illustrations , part numbers , upc codes , text and other pertinent and required elements 审核印刷打样稿,检查图象的准确性,图解及零件编号, upc码,文字和其他固定,要求的元素