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| 表面淬火; 硬表面 | |||
| 淬火表面; 硬质路面; 硬表面; 壳体; 硬面 | |||
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hard surface : 24 phrases in 9 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Chemistry | 3 |
| Ecology | 1 |
| Furniture | 1 |
| Metallurgy | 2 |
| Scuba diving | 3 |
| Technology | 11 |
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