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невидимый спектр : 13 phrases in 10 subjects |
| Aviation medicine | 2 |
| Chemistry | 2 |
| Firefighting and fire-control systems | 1 |
| Makarov | 2 |
| Mass media | 1 |
| Medical | 1 |
| Optics branch of physics | 1 |
| Physics | 1 |
| Polygraphy | 1 |
| Technology | 1 |
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