 |
| звуковая частота: 48 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Astronautics | 3 |
| Aviation | 4 |
| Computers | 1 |
| Electronics | 1 |
| Information technology | 2 |
| Natural resourses and wildlife conservation | 3 |
| Physics | 5 |
| Radio | 19 |
| Technology | 9 |
|
| звуковая частота: 48 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Astronautics | 3 |
| Aviation | 4 |
| Computers | 1 |
| Electronics | 1 |
| Information technology | 2 |
| Natural resourses and wildlife conservation | 3 |
| Physics | 5 |
| Radio | 19 |
| Technology | 9 |