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| intervalle de fréquences | |||
| écart de fréquence (напр. между двумя модами); ton m | |||
| intervalle de fréquence | |||
| частотный интервал: 6 phrases in 3 subjects |
| Acoustics | 1 |
| Astronautics | 2 |
| Physics | 3 |
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