Warning: file_put_contents(): Only 0 of 6068 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/001308.com/index.php on line 55 pretan例句_pretan英汉例句_pretan双解例句_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。