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متبقي : 21 phrases in 12 subjects |
| Acridology | 1 |
| Antennas and waveguides | 2 |
| Electric traction | 1 |
| Electrical engineering | 4 |
| Electronics | 1 |
| Magnetics | 2 |
| Mathematics | 1 |
| Piezoelectric crystals | 1 |
| Radiology | 1 |
| Soil science | 1 |
| Transformers | 5 |
| Vacuum tubes | 1 |
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