基本解释预鞣同根派生 pretan相关词英汉例句Using the syntan to pretan vegetable-tanned sole leather ,the quantity of tannin extract can be reduced in vegetable tanning. 该合成鞣剂用于植鞣底革的预鞣,可减少植鞣时栲胶的用量。pretan更多例句