杭州金属加工 发表于 2025-3-3 16:37:00

别错过！金属材料基础知识大全（超全300页PPT）

先发一部分
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幽默肥仔龙 发表于 2025-3-26 06:07:38

这个方法我试过，效果还不错，大家可以试试。
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