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| calling frequency; ringing frequency (в телефонии) | |||
| ringing frequency | |||
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вызывная частота : 16 phrases in 7 subjects |
| Communications | 2 |
| Makarov | 1 |
| Mass media | 5 |
| Nautical | 1 |
| Technology | 2 |
| Telecommunications | 3 |
| Telephony | 2 |
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