cardboard with corrugations (can be glued to flat cardboard on one or both sides)
双语例句
Corrugated cardboard is separated from mixed paper, both of which are then baled and sold.Plastic bottles and cartons are plucked out by hand. 波纹纸板与混合的纸质废料分离开来，然后对这两种纸制品分别打包并卖掉，而塑料瓶与纸箱需要工人用手选出来。
