11512| 22
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45鋼熱處理后硬度可以到多少不開裂的? |
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點(diǎn)評(píng)
供應(yīng)商是專業(yè)做熱處理的?還是機(jī)加工的?還是說(shuō)零件里面有個(gè)熱處理要求。把圖紙發(fā)出來(lái)看看呢。
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