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光 学成像 : 30 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 5 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 8 |
| Technology | 11 |
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