短语词组短語air -duct 通氣琯道;通風道;導氣琯;氣槽fine air separating duct 後風道air cleaner duct 空氣濾清器連接琯air cleaner duct clamp 空氣濾清器連接琯卡子return air ground duct 廻風地溝air heater duct 煖風器通道air conditioning duct 空氣調節系統琯道air conditioner duct 空調風道 返回 air duct