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Active carbon is a non-metallic element and is often used to filter and liquid or air.
活性碳是非金属元素,常被用来过滤和净化水或空气.
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Active carbon is a non-metallic element and is often used to filter and liquid or air.
活性碳是非金属元素,常被用来过滤和净化水或空气.
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