This kind of plastic is made of gallnut.这种塑料是用五棓子做原料制成的.To study the optimal process of the extraction of tannic acid from Chinese gallnut.从五倍子中提取单宁酸,通过正交实验优化筛选出最佳工艺....

n.没食子，五倍子，棓子...

gallnut的音标：gallnut的英式发音音标为：['gɔ:lnʌt]gallnut的美式发音音标为：['gɔlˌnʌt]...