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红光辐射 : 60 phrases in 12 subjects |
| Agriculture | 2 |
| Aviation | 12 |
| Cartography | 1 |
| Earth sciences | 14 |
| Electronics | 4 |
| Geology | 3 |
| Geophysics | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 2 |
| Space | 16 |
| Technology | 3 |
| United States | 1 |
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