longitudinal ventilation的例句大全

selection of fire scenario in longitudinal ventilation tunnels

纵向通风隧道火灾场景的选择

The paper studies the maximum lengths for natural ventilation in low class highway tunnels which are dependent on traffic volume, car speeds, longitudinal grades of tunnels, types of vehicles, etc.

文章针对车辆为双向行驶的低等级公路隧道，研究无需进行机械通风而仅采用自然通风的隧道最大长度，该长度与交通量、行车速度、隧道纵坡、交通车辆类型等因素有关。

Up to now, more and more highway and railway tunnels generally use the jet flow type longitudinal system, Although the jet flow ventilation system has many merits, its ventilation efficiency to be low, is only 15%.

目前，公路、铁路隧道普遍采用纵向式射流通风，虽然射流通风系统具有很多优点，但射流通风效率较低，一般仅为15%左右。