This new Anit-Snoring Device is a dental appliance without the need of a dentist and dental laboratory technician.
这种新型止鼾器是一种无需牙医和齿科医学检验师帮助就可操作的齿科器械。
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This paper introduces the research and appliance of the aerodynamic measures involved in the wind resistance research taken in the wind tunnel laboratory to which the author belongs.