2506| 9
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關于開放式塑料腔體放大噪音問題 |
點評
堵耳朵是好辦法,古人有實踐,盜鈴。。。。。
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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