短語詞組短語ventilation E duct 通風(fēng)管道ventilation ? duct 通風(fēng)管道dry well ventilation exhaust duct 干井通風(fēng)排氣道geosynclinal ventilation duct 地槽風(fēng)道radial ventilation duct 徑向通風(fēng)溝ventilation duct spacer 風(fēng)道隔片without ventilation duct 無通風(fēng)道 返回 ventilation duct