化学表面改性处理通常在气体介质炉中进行，温度、保温时间及气氛的控制很关键。
The chemical surface modifying heat treatment is usually undertaken in a gas medium furnace with the temperature, soaking time and atmosphere control being as key points.
得出结论：降低出炉温度、缩短在炉时间及控制了炉内气氛是关键。
It is concluded that to reduce temperature from furnace, shorten time in furnace and control atmosphere in furnace are the key points.
天然气锅炉燃烧控制系统的任务是节约能源、改善炉内气氛、减少环境污染。
The task of gas boiler combustion control system is energy-saving, atmosphere improvement in boiler chamber and reducing pollution.
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