|
underfrequency : 31 phrases in 11 subjects |
| Aviation | 1 |
| Electrical engineering | 3 |
| Electricity | 1 |
| Electronics | 5 |
| Energy industry | 4 |
| Energy system | 5 |
| General | 1 |
| Information technology | 1 |
| Power system protection | 1 |
| Security systems | 5 |
| Technology | 4 |
|
underfrequency : 31 phrases in 11 subjects |
| Aviation | 1 |
| Electrical engineering | 3 |
| Electricity | 1 |
| Electronics | 5 |
| Energy industry | 4 |
| Energy system | 5 |
| General | 1 |
| Information technology | 1 |
| Power system protection | 1 |
| Security systems | 5 |
| Technology | 4 |