Warning: file_put_contents(/www/wwwroot/ppbbbu/202081.com/cache/71cffc79edb1b3a320064d0f2bb82e39.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 pretan是什么意思，pretan的翻译，pretan音标、读音、用法和例句_2020年的事情英文词典
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。