在国内各行业对原料对产品的巨大需求驱使下，上游的各大生产厂家也都在如火如荼的开展生产。并且为了保证自己在行业中的有力竞争地位，产品质量也基本上都能够得到保证。可以说上游基本上没有问题了，但是下游呢？
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