The ground is cold and moist, with the chill factor amplified by ventilation fans used to blow fresh air into the mine, and the sprinkler that keep the coal dust down.
因为有通风设备往里面输送新鲜空气，还有洒水器不断地给煤浇水以降温，所以地下既阴冷又潮湿。
Natural ventilation in heated pressure occupies a more and more important position in the building ventilation design because of being free from outside factor influence.
而热压作用下的自然通风方式因不受外界因素的影响在建筑通风设计中占据越来越重要的地位。
Based on hydromechanics affinity theory and major control factor of highway tunnel ventilation, the paper had made certain highway tunnel ventilation boundary condition.
根据流动相似性理论和隧道通风主要控制因素，确定隧道通风的边界条件；
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