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| environmental health | |||
| санитарное состояние окружающей среды: 20 phrases in 8 subjects |
| Ecology | 7 |
| Energy industry | 1 |
| Makarov | 2 |
| Pharmacy and pharmacology | 2 |
| Technology | 2 |
| United Nations | 3 |
| Water supply | 1 |
| Weapons of mass destruction | 2 |
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