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师傅今天教了我一招,觉得特别有用:他说看模具钢材好不好,都不用查牌号,拿砂轮机一磨看火花就知道了。
碳钢火花是亮白色、分叉多;合金钢火花偏橙色、分叉少;高速钢火花很少几乎没分叉。
这个技能太实用了!
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踩过坑的来评论区说说。