| |||
| circuito aberto; sistema directo | |||
|
direct system : 28 phrases in 11 subjects |
| Agriculture | 1 |
| Communications | 5 |
| Earth sciences | 2 |
| Electricity generation | 2 |
| Electronics | 9 |
| Environment | 1 |
| General | 3 |
| Life sciences | 2 |
| Mechanic engineering | 1 |
| Natural sciences | 1 |
| Nuclear physics | 1 |