5611| 19
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CNC難題 |
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點(diǎn)評(píng)
304,,合格的材料基本無(wú)磁性
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點(diǎn)評(píng)
是的
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點(diǎn)評(píng)
對(duì)。封閉的輪廓四周都有了相應(yīng)的約束,,增加抵抗變形的能力,。
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