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4140相当于什么钢_家居日记
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4140相当于什么钢

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4140相当于什么钢 4140在国内是代表合金结构钢。4140钢材的加工性能非常好，在加工后，基本不会出现变形的情况。还带有抗疲劳性能，是中等性的淬透性钢。41


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