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。
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。
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