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一截 : 22 phrases in 12 subjects |
| Air defense | 4 |
| Aviation | 2 |
| Bridge construction | 1 |
| Commerce | 2 |
| Earth sciences | 1 |
| Economy | 1 |
| General | 2 |
| Ice hockey | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 5 |
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