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US4738806A Humidifier for refrigeration showcase 失效
加湿器用于制冷陈列柜

Humidifier for refrigeration showcase
摘要:
The present invention provides a humidifier for a refrigeration showcase comprising a plurality of ultrasonic vibrators for atomizing water, ultrasonic oscillation circuits provided for the vibrators respectively in corresponding relation thereto,and control means for varying the oscillation output of the oscillation circuit corresponding to at least one of the vibrators to control the amount of atomized water to be produced.
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