Warning: file_put_contents(/www/wwwroot/zidian/oumou.cn/cache/d576e60411b075b1e966be9ebc241913.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/oumou.cn/index.php on line 58 pretan是什么意思，pretan的翻译，pretan音标、读音、用法和例句_歐米惠必应词典
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。