樓主: killertoney
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動(dòng)車組:為什么它能把列車經(jīng)過導(dǎo)軌銜接處的噪聲給降低到60分貝? |
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點(diǎn)評(píng)
制動(dòng)器很大啊
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點(diǎn)評(píng)
熱脹冷縮怎么解決的?
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