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| background radiation | |||
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本底 放射 : 17 phrases in 12 subjects |
| Chemistry | 1 |
| Desert science | 1 |
| Earth sciences | 2 |
| Electronics | 2 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 2 |
| Sports | 1 |
| Technology | 3 |
| Wind Energy | 1 |
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