双色球周二走势图

玻璃丝棉对声音有较好的吸声性能

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双色球周二走势图

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玻璃丝棉对声音有较好的吸声性能

作者:http://zerokazama.com 时间:2020-01-02 09:35:55

玻璃丝棉双色球周二走势图对声音有较好的吸声性能。影响离心玻璃吸声性能的主要因素是密度、厚度和空气流阻等。密度是每立方米材料的重量。空气流阻是单位厚度时材料两侧空气气压和空气流速之比。空气流阻是影响玻璃丝棉吸声性能最重要的因素。流阻太小,说明材料稀疏,空气振动容易穿过,吸声性能下降。

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