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| متكرِّر | |||
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powtórny : 11 phrases in 8 subjects |
| Electric motors | 1 |
| Electricity generation | 1 |
| Mathematics | 2 |
| Radio | 1 |
| Statistics | 2 |
| Telecommunications | 1 |
| Telegraphy | 1 |
| Vacuum tubes | 2 |
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