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| optical-frequency transition | |||
| optical transition; opticalfrequency transition | |||
| оптический переход: 21 phrases in 7 subjects |
| Astronomy | 1 |
| Automated equipment | 1 |
| Electronics | 2 |
| Makarov | 3 |
| Mass media | 5 |
| Nanotechnology | 7 |
| Technology | 2 |
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