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射线 光 学 : 52 phrases in 13 subjects |
| Agriculture | 1 |
| Aviation | 3 |
| Chemistry | 2 |
| Earth sciences | 11 |
| Electronics | 5 |
| Engineering geology | 1 |
| General | 2 |
| Geology | 1 |
| Metallurgy | 13 |
| Oil / petroleum | 1 |
| Space | 5 |
| Technology | 6 |
| United States | 1 |
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