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| 清理表面: 54 phrases in 12 subjects |
| Aviation | 1 |
| Chemistry | 3 |
| Construction | 1 |
| General | 3 |
| Metallurgy | 32 |
| Nautical | 1 |
| Roll stock | 2 |
| Shipbuilding | 1 |
| Space | 2 |
| Steel production | 1 |
| Technology | 6 |
| Textile industry | 1 |
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