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| принцип организации ПВО по районам; принцип организации по районам; территориальная концепция | |||
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area concept : 8 phrases in 5 subjects |
| Aerohydrodynamics | 1 |
| Military | 4 |
| Programming | 1 |
| Sakhalin | 1 |
| Water resources | 1 |
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