Real flue gas is made up of nitrogen oxide (NOx), nitrogen, and oxygen as well as CO2, Peter tells me.
'真正的烟气是由氮氧化物(NOx)、氮、氧以及二氧化碳组成，'彼得介绍说。
If the flue overdraws, all the heat goes right up the chimney.
如果风管抽风过度的话，热量就会从烟囱直接跑掉了。
Flue gas can also beset up waste heat recovery system to increase the thermal efficiency of furnace.
也可以设置烟气余热回收系统来提高加热炉的热效率。
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