 |
|
harmonic frequency : 38 phrases in 15 subjects |
| Acoustics | 3 |
| Automated equipment | 1 |
| Aviation | 1 |
| Construction | 1 |
| Electrical engineering | 1 |
| Electronics | 5 |
| Geophysics | 1 |
| Makarov | 9 |
| Mass media | 1 |
| Nuclear and fusion power | 1 |
| Physics | 2 |
| Radioengineering | 3 |
| Soviet | 1 |
| Technology | 7 |
| Television | 1 |