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为了保证城市下水道安全,重庆市在主城区设置了350个监测预警点,一旦下水道有毒或易燃气体超标,监测设施将自
In order to ensure the safety of urban sewers, Chongqing Municipality has set 350 monitoring and early warning points in the main urban area. Once sewer toxic or flammable gas exceeds the standard, the monitoring facilities will reset