When setting positive pressure mechanical air supply system in smoke controlling stair hall, the outer window in the hall must be fixed.
楼梯间设置正压送风系统时，楼梯间设置的外窗应明确为固定窗；
To satisfy the demands for air supplement, mechanical pressurized air supply system is set. Air supply level is calculated by no less than 50% of smoke exhaust level.
为满足补风需要，设机械加压送风系统，送风量按不小于排烟量的50%计算。
The several different mechanical pressure air supply systems are simulated by analyzing the style of pressurization air supply system, air volume and its influence factors.
通过分析机械加压送风系统的方式、送风量及影响因素，对机械加压送风系统的几种方式进行了计算机模拟。
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