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中直线 : 27 phrases in 12 subjects |
| Aviation | 2 |
| Earth sciences | 1 |
| Electronics | 5 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 2 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Nautical | 2 |
| Navigation | 1 |
| Technology | 7 |
| Telecommunications | 2 |
| Textile industry | 2 |
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