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frequenza fonica; frequenza telefonica; frequenza vocale | |||
banda vocale | |||
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frequenza vocale; frequenza in banda telefonica |
voice frequency : 42 phrases in 7 subjects |
Communications | 15 |
Electronics | 9 |
Information technology | 12 |
Power lines | 2 |
Telecommunications | 1 |
Telegraphy | 2 |
Telephony | 1 |