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| фокусировка лучей | |||
| фокусирование лучей | |||
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ray focusing : 7 phrases in 6 subjects |
| Analytical chemistry | 1 |
| Makarov | 2 |
| Oil / petroleum | 1 |
| Physics | 1 |
| Seismology | 1 |
| Technology | 1 |
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