Warning: file_put_contents(): Only 0 of 6360 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/001308.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_零食美味英文词典
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。