 |
| switching voltage: 56 phrases in 17 subjects |
| Computers | 1 |
| Construction | 1 |
| Electrical engineering | 8 |
| Electricity | 1 |
| Electronics | 3 |
| Energy industry | 6 |
| Energy system | 2 |
| General | 1 |
| Information technology | 3 |
| Mass media | 1 |
| Mathematics | 1 |
| Military | 2 |
| Molikpaq | 5 |
| Oil and gas | 1 |
| Technology | 17 |
| Telecommunications | 2 |
| Transformers | 1 |