DWS[医][=Drug Warning System]药物警戒系统hhdwsheavy handy dead-weight scrap 沉重方便净负载废金属料DWSCDirector of Welfare and Service Conditions 福利及服务条件理事会DWSODrainage and Water Supply Office 排水及水供应办公室DWSAPDrinking Water Source Assessment Program 饮用水资源评估计划dwsdoublewhitesilk双白丝;d..DWsdrinking waters 饮用水