4754| 3
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40CR的材料,经过冷锻能否达到HRC25-30的硬度?---[请教] |
Re: 请教:40CR的材料,经过冷锻能不能达到HRC25-30
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Re: 40CR的材料,经过冷锻能否达到HRC25-30的硬度?---[请教]
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Re: 40CR的材料,经过冷锻能否达到HRC25-30的硬度?---[请教]
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