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動車組:為什么它能把列車經過導軌銜接處的噪聲給降低到60分貝? |
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點評
制動器很大啊
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點評
熱脹冷縮怎么解決的?
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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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