 |
| seccionamento: 28 phrases in 11 subjects |
| Cables and cable production | 1 |
| Chemistry | 2 |
| Earth sciences | 1 |
| Electric traction | 2 |
| Electrical engineering | 1 |
| Electronics | 7 |
| Materials science | 2 |
| Mechanic engineering | 4 |
| Metallurgy | 1 |
| Power system protection | 2 |
| Transport | 5 |