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| acoustical mode | |||
| low-frequency mode (кристаллической решётки); acoustical type of vibration (кристаллической решётки); acoustic mode (кристаллической решётки) | |||
| акустическая ветвь колебаний: 5 phrases in 3 subjects |
| Electronics | 1 |
| Makarov | 1 |
| Technology | 3 |
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