 |
| ground protection: 51 phrases in 16 subjects |
| Automatic control | 1 |
| Construction | 2 |
| Ecology | 2 |
| Electrical engineering | 6 |
| Electronics | 4 |
| Energy industry | 1 |
| Firefighting and fire-control systems | 1 |
| Makarov | 5 |
| Measuring instruments | 4 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Power system protection | 1 |
| Programming | 2 |
| Technology | 18 |
| Telecommunications | 1 |
| Transport | 1 |