防烟分区是指在设置排烟措施的过道、房间中，用隔墙或其他措施（可以阻拦和限制烟气流动）分隔的区域。
建筑防火防烟分区和建筑构造；
Structural fire precaution against smoke district and building structure;
为实现风机的兼用，提出通过划分防烟分区，使排烟风量与通风风量保持一致的方法。
Presents a method to make the smoke exhaust rate equal to the ventilation rate by smoke control zoning for the usage of the dual purpose fan.
摘要对于排风兼排烟系统，当烟气蔓延至相邻防烟分区时，将产生系统二次排烟问题。
For the air exhaust plus smoke evacuation system, the problem of secondary smoke evacuation arises when smoke spreads to adjacent smoke-control zones.
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