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调整高度 : 35 phrases in 10 subjects |
| Automobiles | 8 |
| Aviation | 3 |
| Chemistry | 1 |
| Construction | 1 |
| General | 4 |
| Oil / petroleum | 2 |
| Rail transport | 6 |
| Space | 1 |
| Steel production | 1 |
| Technology | 8 |
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