隧道内一氧化碳污染来源于列车通过时机车所排放的烟气，对列车乘务人员、旅客和隧道内作业人员有一定的危害。国内资料报导严重时曾造成机车司机被烟熏倒中毒而导致被迫停车事故。为掌握局管内隧道的一氧化碳污染状况，由上海路局卫生处组织对南京、杭州、福州三个分局境... The pollution of carbon monoxide in the tunnel comes from the flue gas emitted by the locomotive when the train passes the locomotive, which is harmful to train crew, passengers and tunnel workers. Serious cases of domestic data have caused locomotive drivers to be poisoned and smothered, causing forced parking accidents. In order to grasp the situation of carbon monoxide pollution in the tunnel of the Bureau, Shanghai Bureau of Health Bureau organizes three branch offices in Nanjing, Hangzhou and Fuzhou ...