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光子 数 : 53 phrases in 11 subjects |
| Agriculture | 4 |
| Aviation | 1 |
| Chemistry | 2 |
| Earth sciences | 3 |
| Electronics | 16 |
| General | 3 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Space | 3 |
| Technology | 17 |
| Telecommunications | 2 |
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