"silencers" CNS Standards List |
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CNS 15256
2021 Edition Acoustics – Laboratory measurement procedures for ducted silencers and air-terminal units – Insertion loss, flow noise and total pressure loss 聲學-風管消音箱及空氣終端單元之實驗室量測程序-插入損失、氣流噪音及總壓力損失 |
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