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| дни нарушения связи | |||
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| день высокой геомагнитной активности | |||
| возмущённый день | |||
| disturbed days: 7 phrases in 5 subjects |
| Astronautics | 1 |
| Astronomy | 2 |
| Geophysics | 2 |
| Makarov | 1 |
| Telecommunications | 1 |
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