| |||
| ionospheric study | |||
|
исследование ионосферы : 30 phrases in 6 subjects |
| Antennas and waveguides | 1 |
| Astronautics | 8 |
| Meteorology | 1 |
| Military | 7 |
| Radio | 12 |
| Technology | 1 |
| |||
| ionospheric study | |||
|
исследование ионосферы : 30 phrases in 6 subjects |
| Antennas and waveguides | 1 |
| Astronautics | 8 |
| Meteorology | 1 |
| Military | 7 |
| Radio | 12 |
| Technology | 1 |