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| космические лучи | |||
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| сердцевинный луч | |||
| primary rays: 10 phrases in 7 subjects |
| Astronautics | 1 |
| Astronomy | 1 |
| Makarov | 3 |
| Mining | 1 |
| Physics | 1 |
| Technology | 1 |
| Telecommunications | 2 |
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