樓主: liwsi19880202
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求助,,10mm后的鋼板中間銑掉,,留下筋,,能增強強度么? |
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點評
鑄件才會這么干,,因為這樣整塊厚度很大的鑄件很難澆鑄,容易變形和收縮,,所以要這樣,,另外就是減重去成本
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