8577| 22
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動車上的扶手,這么耐磨,是咋做出來的呀? |
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點評
應該是表面噴砂之后再拋光、拉絲吧?
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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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