换气

• I can ' t do the breaststroke very well because i always hold my breath
  我蛙式游得很糟，因为我不会换气。
• The diver came up for air again
  潜水员又露出水面换气。
• Ventilation controlled combustion
  控制换气的燃烧
• Standaard method for measurement of infiltration rates of indoor air in public places
  公共场所室内换气率测定标准方法
• Exercise ventilation set
  换气量运动试验器
• Mbc maximum breathing capacity
  最大换气量
• Exchange - compression stroke
  换气压缩行程
• Lung ventilators - particular requirements for operator - powered resuscitators
  肺换气机.对操作人员控制的复苏器的特殊要求
• Expansion - exchange stroke
  膨胀换气行程
• Diurnal breathing losses
  昼间换气损失