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| 放射性系: 25 phrases in 9 subjects |
| Earth sciences | 2 |
| Electronics | 12 |
| General | 1 |
| Geophysics | 1 |
| Nuclear and fusion power | 1 |
| Nuclear physics | 2 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 4 |
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