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trasmittente : 55 phrases in 12 subjects |
| Antennas and waveguides | 1 |
| Astronomy | 3 |
| Communications | 22 |
| Earth sciences | 2 |
| Electronics | 11 |
| General | 4 |
| Life sciences | 1 |
| Mechanic engineering | 2 |
| Medical | 1 |
| Radio | 5 |
| Telegraphy | 1 |
| Transport | 2 |
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