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| линия переноса речевых сигналов полосой 300-3400 Гц; речевой канал (oleg.vigodsky); телефонная цепь | |||
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voice circuit : 30 phrases in 7 subjects |
| Communications | 3 |
| Information security and data protection | 3 |
| Information technology | 1 |
| Mass media | 5 |
| Security systems | 6 |
| Technology | 2 |
| Telecommunications | 10 |
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