樓主: Shi
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機械的設計振動頻率值在多少范圍內(nèi)合理? |
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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