 |
| оптическое устройство: 55 phrases in 15 subjects |
| Astronautics | 1 |
| Automated equipment | 4 |
| Aviation | 1 |
| Computers | 6 |
| Forestry | 1 |
| General | 3 |
| Information technology | 11 |
| Mechanic engineering | 4 |
| Medical | 1 |
| Physics | 1 |
| Polygraphy | 1 |
| Radio | 7 |
| Surveying | 2 |
| Technology | 11 |
| United Nations | 1 |