3589| 6
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這樣的螺紋如何車 |
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點評
說的正確,調質硬度不應影響加工性能的。
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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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