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| оптическая двойная | |||
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optical double : 47 phrases in 9 subjects |
| Astronautics | 1 |
| Cables and cable production | 24 |
| Cartography | 1 |
| Electronics | 3 |
| Gyroscopes | 1 |
| Household appliances | 1 |
| Makarov | 11 |
| Mass media | 2 |
| Technology | 3 |
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