waste PU废聚氨酯wasten.废物；浪费；荒地v.浪费；滥用；消耗adj.荒芜的；无用的；浪费的Waste Products Recycling产品回收waste residue of vitriol硫酸废渣waste-land reclamation荒地开垦waste alkali-slag dump碱渣堆场waste water purification废水净化waste-EVA in packaging包装废EVAwaste water infiltration废水渗透wastewater treat- ment污水处理wastewater stabilization废水的稳定wastewater of paper mill造纸废水