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heater:any device for supplying heat, such as a hot-air blower, radiator, convector, etchumidifier:a device for increasing or controlling the water vapour in a room, building, etcdehumidifier:a device for reducing the moisture content of the atmospherefan:any device for creating a current of air by movement of a surface or number of surfaces, esp a rotating device consisting of a number of blades attached to a central hub你的问题形式很新颖,希望我的回答对你有所帮助!
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