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| segnale di avvertimento; trasmissione in diretta; segnale luminoso | |||
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on the air : 56 phrases in 13 subjects |
| Antennas and waveguides | 1 |
| Astronautics | 1 |
| Communications | 2 |
| Electronics | 1 |
| Environment | 15 |
| Finances | 1 |
| General | 4 |
| Law | 1 |
| Measuring instruments | 1 |
| Metallurgy | 1 |
| Politics | 6 |
| Social science | 1 |
| Transport | 21 |
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