APP An amorphous form of carbonmade by heating wood or other organic ma-terial in the absence of air. Activated char-coal is charcoal heated to drive off absorbedgas. It is used for absorbing gases and forremoving impurities from liquids.碳的无定形形式,是在缺乏空气的条件下加热木......（本文共 271 字） [阅读本文] >>
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