1】 Professional English on Water Supply and Sewerage Engineering 给水排水工程专业英语 drains for water-carried wastes 污水处理 (排污水的排水管道 ) a settling reservoir 预沉池 aqueduct 渠道,导水管 filtration 过滤 distillation 蒸馏 clarification 澄清 coagulation 血凝 stone-grated 格栅、格网 turbidity 浊度 cistern 蓄水池、槽 gpcd 每日每人加仑数 coagulant 混凝剂 combined sewers 合流制排水管道 prehistoric word 石器时代 rapid-sand filter 快砂滤池 water supply and wastewater d