11929| 22
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軸的強度校核計算公式的探究 |
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評分
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點評
轉(zhuǎn)了多久斷了,斷口金相有沒有,應(yīng)當(dāng)先分析出斷裂的原因,是沖擊斷裂還是疲勞斷裂,是材料有問題還是設(shè)計有問題,才好下手
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