而一款售价23美元的改进型劈柴炉则专门针对农村家庭主妇，它有更高的发热率及较低的排烟量。
For the village housewife, a wood-burning stove has been reinvented to make more heat and less smoke for $23.
文章建议根据火源释热率、火灾发生后的逃生时间、烟气层的控制高度合理确定大空间的机械排烟速率。
Therefore the article recommends that according to fire heat release rate, escape time and control height of smoke layer, the rate of mechanical smoke extraction should be reasonably decided.
影响加热炉运行效率的主要参数有空气过剩系数、加热炉负荷率、排烟温度等。
The factors influencing the efficiency of the heat stove are the surplus coefficient of the air, negative stress of heat stove, temperature of the discharged smoke.
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