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| 闭上: 37 phrases in 13 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Dentistry | 2 |
| Drilling | 1 |
| General | 6 |
| Mathematics | 1 |
| Nautical | 3 |
| Oil / petroleum | 2 |
| Project management | 1 |
| Securities | 2 |
| Shipbuilding | 1 |
| Steel production | 1 |
| Technology | 15 |
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