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| spred of contamination (Yuliya13) | |||
| contamination propagation | |||
| prevalence of pollution | |||
| dissipation of contamination (Sakhalin Energy) | |||
| распространение загрязнения: 7 phrases in 5 subjects |
| Ecology | 1 |
| Energy industry | 2 |
| Makarov | 1 |
| Nuclear physics | 1 |
| Technology | 2 |