提出准三维土壤—空气传热传质模型，对地道通风系统内空气与土壤之间的热物理过程进行数值模拟。
A quasi-three-dimensional model was developed to simulate earth-to-air heat exchange process in underground duct system(UDS), which ignores heat transfer in the earth in the direction of air flow.
此地道配备了通风系统和电力设施，还有运输麻醉品的轨道。
The tunnel was fully operational with a system of ventilation and electricity, and rails for the transportation of narcotics.
他们在地道里搭建了钢管用以支撑这条穿过了一条国家的主干道的地道，还在地道里安装了照明和通风系统。
They put in metal beams to support the tunnel as it ran under one of the country's main highways, and they installed lighting and ventilation.
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