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Cr12MoV熱處理后不耐磨 |
點評
深冷在去應力作用上能否取代低溫回火作用?或者哪個效果更佳?
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點評
這個講的有道理,要找問題得全程過一遍,一個都不能遺漏,當然先把簡單的核一遍,不是一上去就驗金相
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