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如何区分TI 335 处理器是否翻新?

公司在代理商收到一批AM3352BZCZD80    同一个包装内部有两个版本的的芯片,分别是:1、7AA0NLW(无磨砂)    2、 7AA0NJW(有磨砂)         目前我怀疑无磨砂的为翻新品,有大神帮忙判断下吗?