On the other hand, cryogenic compressed air in the heat exchanger temperature rise, so that the exhaust pipe is not caused by low temperature and dewing phenomenon.
另一方面，低温压缩空气在热交换器里温度得到回升，使排气管道外壁不致因温度过低而出现结露现象。
The maximum heat exchange efficiency of the boiler was about 99%, the smoke exhaust temperature was very low, and some water vapor coagulated.
燃气炉的最高换热效率约为99%，排烟温度很低，部分水蒸汽凝结。
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