Experiments on the air infiltration by tracer gas method and obtains the range of air infiltration rate per unit length of the crack.
采用示踪气体法对塑钢窗冷风渗透量进行了实验，得出了塑钢窗单位长度渗风量的范围。
Emphasizes that the resistance of the pipe system and the air infiltration rate under smoke exhausting are far more than those under ventilation, so as to need a careful calculation.
强调排烟工况下管网总阻力、漏风量均远大于通风空调工况，必须严格认真地计算。
Emphasizes that the resistance of the pipe system and the air infiltration rate under smoke exhausting are far more than those under ventilation, so as to need a careful calculation.
强调排烟工况下管网总阻力、漏风量均远大于通风空调工况，必须严格认真地计算。
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