加湿机heater:any device for supplying heat, such as a hot-air blower, radiator, convector, etc humidifier:a device for increasing or controlling the water vapour in a room, building, etc dehumidifier:a device for reducing the moisture content of the atmosphere fan: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！加湿机

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