• 1. air tunnel: 风洞
• 2. compressed air tunnel: 压缩空气风洞
• 3. free-air tunnel: 自由空气风洞

更多释义

• 1.Ventilation cabinet includes exhaust air tunnel, supply air tunnel, transport tunnel, pedestrian tunnel, equipment cavern, cross-passage etc.
  通风机房洞室群一般包括：排风通道、送风通道、运输通道、人行通道、设备房、联络送风道、联络排风道等。
  dict.yoduao.com
• 2.If a train entered the tunnel, it would draw in fresh air behind it.
  如果有一列火车开进隧道，它就把新鲜空气随之抽了进来。
  dict.yoduao.com
• 3.This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
  因为如果有列火车开进隧道，它就把新鲜空气随之抽进了隧道。
  dict.yoduao.com

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