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em aberto : 26 phrases in 9 subjects |
| Accumulators | 2 |
| Antennas and waveguides | 1 |
| Automatic control | 2 |
| Electric machinery | 1 |
| Electric motors | 6 |
| Electronics | 7 |
| Microsoft | 3 |
| Radio | 1 |
| Transformers | 3 |
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