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| huvudkrets; traktionskrets | |||
| sekundärkrets; lågspänningskrets | |||
| circuito de potência: 12 phrases in 5 subjects |
| Electronics | 7 |
| Metallurgy | 2 |
| Physical sciences | 1 |
| Power system protection | 1 |
| Welding | 1 |
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