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a bandes : 65 phrases in 13 subjects |
| Antennas and waveguides | 1 |
| Chemistry | 4 |
| Communications | 10 |
| Construction | 23 |
| Electronics | 6 |
| General | 1 |
| Information technology | 1 |
| Magnetics | 4 |
| Mathematics | 3 |
| Radio | 3 |
| Sound recording | 1 |
| Telegraphy | 7 |
| Thermal Energy | 1 |