11171| 22
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軸的強(qiáng)度校核計(jì)算公式的探究 |
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評分
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點(diǎn)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(jì)有問題,,才好下手
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