 |
| light conditions: 21 phrases in 13 subjects |
| Architecture | 1 |
| Astronautics | 2 |
| Automated equipment | 1 |
| Aviation | 1 |
| Electrical engineering | 1 |
| General | 1 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Nautical | 2 |
| Pumps | 1 |
| Scientific | 2 |
| Security systems | 2 |
| Technology | 5 |