 |
| |||
| optical region (спектра) | |||
| оптическая область: 56 phrases in 12 subjects |
| Astronautics | 1 |
| Astronomy | 2 |
| Aviation | 1 |
| Cables and cable production | 5 |
| Electronics | 3 |
| Makarov | 2 |
| Mass media | 23 |
| Military | 6 |
| Nanotechnology | 5 |
| Spectroscopy | 1 |
| Technology | 5 |
| Telecommunications | 2 |