4252| 3
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有一個直徑475mm,長1000mm的輥子,如何簡單的做動平衡? |
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點評
你是搞電力的還是別的?
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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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