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| audio frequency AF (NF); low frequency | |||
| audible frequency; audible tone | |||
| Low Frequency | |||
| audiofrequency | |||
| audio frequency (AF); voice frequency | |||
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| a.f. | |||
| AF; AF -audio frequency; low frequency (30-3000 KHz) | |||
| low-frequency | |||
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| low-frequency | |||
| Немецкий тезаурус | |||
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| Nf | |||
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Niederfrequenz : 33 фразы в 7 тематиках |
| Медицина | 1 |
| Медицинская техника | 3 |
| Металлургия | 2 |
| Общая лексика | 2 |
| Связь | 3 |
| Техника | 10 |
| Электроника | 12 |