|
very low frequency : 59 phrases in 14 subjects |
| Automated equipment | 1 |
| Electronics | 7 |
| Geophysics | 10 |
| Household appliances | 1 |
| Makarov | 5 |
| Metrology | 1 |
| Military | 10 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Physics | 2 |
| Programming | 1 |
| Seismology | 1 |
| Technology | 13 |
| Telecommunications | 5 |