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| 强化处理; 人工时效处理 | |||
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| 沉淀硬化处理 (在固溶处理后进行的) | |||
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precipitation treatment : 9 phrases in 4 subjects |
| Metallurgy | 3 |
| Polymers | 1 |
| Technology | 4 |
| Water resources | 1 |
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