natural ventilation〔名词〕自然通风详细»
natural ventilation自然通风，自然换气详细»
自然通风natural ventilation;natural draft详细»
自然通风natrual ventilation;natural draft;natural draught详细»
自然通风natural draft;natural ventilation详细»
自然通风natural draft;natural ventilation详细»
自然通风natural draft ventilation;natural ventilation详细»
自然通风natural draft draught;natural draft,draught;natural ventilation详细»
自然通风natural ventilation;chimney ventilation;natural draught详细»