Deep study was made on reverse smoke flow during fire in the entry by theoretical analysis method.
采用理论分析的方法，对水平巷道火灾时期的烟气逆流现象进行了深入研究。
The utility model relates to a magnetic reverse smoke preventing cover for preventing the reverse smoke of a cooking fume exhauster in a kitchen.
一种磁性防倒烟罩，供防止厨房中的排油烟机倒烟使用。
The utility model relates to a magnetic reverse smoke preventing cover for preventing the reverse smoke of a cooking fume exhauster in a kitchen.
一种磁性防倒烟罩，供防止厨房中的排油烟机倒烟使用。
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