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。
And co and CO_2 concentration far away the fire source may keep a high level or higher than those at the hallway near the fire source when the smoke exhaust system is run.
在机械排烟正常启动情况下，沿着走道水平方向，走道远离火源处的CO和CO_2能够维持相当高的浓度，甚至高于走道近火源处的浓度。
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