3521| 3
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直徑32的45號鋼,經過鐓粗和鍛打過程,產品開裂 |
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點評
這應該是自由鍛吧,只是簡單的模型
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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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