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оптическое слежение : 45 phrases in 10 subjects |
| Astronautics | 4 |
| General | 1 |
| Mass media | 3 |
| Metrology | 2 |
| Military | 21 |
| Missiles | 1 |
| Nanotechnology | 4 |
| Nuclear and fusion power | 1 |
| Optics branch of physics | 1 |
| Technology | 7 |
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