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Plastic and paper is separated into fewer colours and categories;
塑料和纸制品在颜色和类别的分类上都显得不足。
youdao
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What are the top categories of plastic resin used in medical devices?
医疗设备用塑胶的主要分类为何？
youdao
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What are the top categories of plastic resin used in medical devices?
医疗设备用塑胶的主要分类为何？
youdao