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| 钢质零部件; 钢质零件 (Normalizing involves heating the steel parts to temperature of about 55 -100°C above the critical range and cooling in still air. 正火的方法是将钢质零部件加热到临界温度以上约 55 - l00°C, 然后在静止的空气中冷却。) | |||
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steel part : 5 phrases in 1 subject |
| Metallurgy | 5 |
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