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吸声尖劈的下限频率
吸声尖劈的吸声系数达99%的最低频率。
来源:《消声室和半消声室技术规范 GB50800-2012》
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Archiver|手机版|小黑屋|牛马Next ( 苏ICP备17047105号-6 )Published by Stonespider

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