smoke prevention division 防烟分区
smoke prevention staircase 防烟楼梯间
smoke-prevention stairwell 防烟楼梯间
smoke prevention stairwell 防烟楼梯间
When the velocity of jet stream from smoke prevention air curtain is more than 10m/s, 6 minutes for safety evacuation will be enough without mechanical ventilation.
在防烟空气幕喷射不小于10m/s 的向下射流时,即使不采用机械排烟的情况下,也能确保站台层人员6 分钟的安全疏散时间。
参考来源 - 地铁站火灾烟气扩散及控制的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Two smoke prevention stairs are in the building, one is next to the elevator and another is at the top of the southwest of the building.
本大楼设防烟楼梯两部，分别为电梯核心筒处一部，大楼西南侧顶端一部，是火灾发生后的逃生处。
Through the analysis of some problems in designing the smoke prevention and exhaust of high - rise civil building, this paper puts forward the author's opinions and relevant countermeasures.
本文通过对高层民用建筑防、排烟设计中一些问题的分析，提出了作者的看法以及采取的具体措施。
A survey by Hangzhou Center for Disease Control and Prevention shows that the scale of youth smoking is increasing and the age of people who smoke tends to be lower.
杭州市疾控中心调查发现，青少年吸烟比例逐渐加大，吸烟人群呈现低龄化的趋势。
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