Two is the weight of a carbon black products there is a certain weight particularly light may be made by charcoal which did not reach the adsorption effect.
二是重量，一个炭雕产品是有一定重量的，特别轻的可能是由一般木炭制成，这就达不到吸附作用了。
Two is the weight of a carbon black products there is a certain weight particularly light may be made by charcoal which did not reach the adsorption effect.
二是重量，一个炭雕产品是有一定重量的，特别轻的可能是由一般木炭制成，这就达不到吸附作用了。
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