Variable Frequency
| Oscillator
| variable frequency | |
| gen. | frecuencia variable |
| oscillator | |
| gen. | oscilador |
| el. | circuito oscilante |
| |||
| frecuencia variable | |||
|
Variable Frequency : 8 phrases in 5 subjects |
| Electric traction | 1 |
| Electronics | 4 |
| Mechanic engineering | 1 |
| Technology | 1 |
| Transport | 1 |