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同體,不同硬度,,如何實現(xiàn),? |
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點(diǎn)評
層主的意思是,,先把彈性夾頭整體淬火成根部的硬度,,然后再對工作部分高頻淬火達(dá)到更高硬度,?
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點(diǎn)評
樓上有幾位和大俠一個意思,,哈
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