The content of unsaponifiable neutral substances in tall oil is obviously decreased from 32.8% to 17.4% and 18.0%.The acid number of tall oil is greatly increased from 119 to 169 and 153.是什么意思_The content of unsaponifiable neutral substances in tall oil is obviously decreased from 32.8% to 17.4% and 18.0%.The acid number of tall oil is greatly increased from 119 to 169 and 153.在线翻译_英语_读音_用法_例句