Describes the composition and running modes of the smoke control and exhaust system,including the fire ventilation system at stations and in the tunnel,and the fire alarm and device control system.是什么意思_Describes the composition and running modes of the smoke control and exhaust system,including the fire ventilation system at stations and in the tunnel,and the fire alarm and device control system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句