6848| 12
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軸承中的鋼球如何制作的? |
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回復 2# 的帖子
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這是老工藝,現在的工藝也與之大同小異
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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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