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colisión: 40 phrases in 14 subjects |
Aeronautics | 1 |
Antennas and waveguides | 1 |
Chemistry | 1 |
Communications | 3 |
Earth sciences | 3 |
General | 1 |
Meteorology | 2 |
Nautical | 1 |
Patents | 3 |
Physical sciences | 1 |
Radiology | 2 |
Technology | 5 |
Telegraphy | 1 |
Transport | 15 |