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| 航径: 33 phrases in 9 subjects |
| Air defense | 4 |
| Aviation | 5 |
| Cartography | 1 |
| Construction | 1 |
| General | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 1 |
| Space | 8 |
| Technology | 11 |
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