 |
|
radio-echo : 34 phrases in 14 subjects |
| Air defense | 1 |
| Astronautics | 1 |
| Astronomy | 4 |
| Electronics | 1 |
| General | 3 |
| Geophysics | 3 |
| Makarov | 4 |
| Meteorology | 2 |
| Military | 1 |
| Nanotechnology | 1 |
| Physics | 4 |
| Shipbuilding | 1 |
| Technology | 6 |
| Telecommunications | 2 |
|
|
radio-echo : 34 phrases in 14 subjects |
| Air defense | 1 |
| Astronautics | 1 |
| Astronomy | 4 |
| Electronics | 1 |
| General | 3 |
| Geophysics | 3 |
| Makarov | 4 |
| Meteorology | 2 |
| Military | 1 |
| Nanotechnology | 1 |
| Physics | 4 |
| Shipbuilding | 1 |
| Technology | 6 |
| Telecommunications | 2 |