doublelayer filter 双层滤料滤池

doublelayer mould 双层模具

electro-doublelayer 静电除盐

chemical doublelayer 化学双电层

doublelayer container 双层集装箱

doublelayer aggregate 双层集

doublelayer figure fabric 双层纹织物

doublelayer construction model 两层结构模型

doublelayer steel concrete wall 双层钢筋混凝土井壁