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| signal identification | |||
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| signal identification | |||
| идентификация сигнала: 32 phrases in 9 subjects |
| Computer networks | 1 |
| Computers | 2 |
| Electronics | 3 |
| Information security and data protection | 1 |
| Mass media | 16 |
| Navigation | 1 |
| Security systems | 1 |
| Technology | 2 |
| Telecommunications | 5 |