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otwarty : 34 phrases in 12 subjects |
| Accumulators | 2 |
| Automatic control | 5 |
| Electric motors | 5 |
| Electricity generation | 1 |
| Electronics | 3 |
| Environment | 2 |
| Mathematics | 3 |
| Microsoft | 8 |
| Physics | 1 |
| Telecommunications | 1 |
| Telephony | 1 |
| Transformers | 2 |
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