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45鋼內孔需要粘硅鋼片 但是孔做大了3絲 電鍍影響么 |
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,浙公網安備33038202004372號 )
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