wastecan污物桶wasten.废物；浪费；荒地v.浪费；滥用；消耗adj.荒芜的；无用的；浪费的wastewater renovation废水再净waste pad lubrication绒垫润滑法waste one's substancewaste asphalt mixture废旧沥青混合料waste heat recovering余热回收waste water cleansing废水处理waste paper recycling废纸回用waste-pigskin-oil猪皮废油waste gas feed heater废气送料加热器waste heat utilizaton余热利用