| |||
| variable frequency | |||
|
frecuencia variable : 8 phrases in 6 subjects |
| Electric motors | 1 |
| Electric traction | 1 |
| Electronics | 3 |
| Mechanic engineering | 1 |
| Statistics | 1 |
| Transport | 1 |
| |||
| variable frequency | |||
|
frecuencia variable : 8 phrases in 6 subjects |
| Electric motors | 1 |
| Electric traction | 1 |
| Electronics | 3 |
| Mechanic engineering | 1 |
| Statistics | 1 |
| Transport | 1 |