 |
| отражённая волна: 50 phrases in 12 subjects |
| Analytical chemistry | 1 |
| Construction | 1 |
| Electronics | 1 |
| Geology | 9 |
| Hydraulic engineering | 16 |
| Natural resourses and wildlife conservation | 3 |
| Oil and gas technology | 5 |
| Physics | 1 |
| Radio | 1 |
| Seismology | 2 |
| Technology | 5 |
| United Nations | 5 |