7868| 16
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機械結構減重問題 |
點評
比重或密度鋼是鋁的2.8倍多,改材質后要減重65%左右,靠譜嗎。 ^_^
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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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