| |||
| effective | |||
|
efectivo : 39 phrases in 16 subjects |
| Antennas and waveguides | 5 |
| Chemistry | 1 |
| Electric machinery | 1 |
| Electric motors | 1 |
| Electric traction | 1 |
| Electronics | 6 |
| Isolation | 1 |
| Lighting other than cinema | 2 |
| Magnetics | 4 |
| Mathematics | 5 |
| Power lines | 1 |
| Radiology | 3 |
| Semiconductors | 3 |
| Sound recording | 1 |
| Telegraphy | 3 |
| Welding | 1 |