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| frecuencia de transposición | |||
| shift frequency: 55 phrases in 9 subjects |
| Communications | 22 |
| Earth sciences | 1 |
| Electronics | 20 |
| General | 1 |
| Information technology | 3 |
| Materials science | 1 |
| Meteorology | 1 |
| Technology | 4 |
| Telegraphy | 2 |
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