基本解释預鞣同根派生 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. 該郃成鞣劑用於植鞣底革的預鞣,可減少植鞣時栲膠的用量。pretan更多例句