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45號鋼熱處理時開裂,請問大家怎么回事?。?/span> |
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點評
高人,很專業(yè),長見識了。
評分
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Archiver|手機版|小黑屋|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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