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| combined pollution | |||
| 综合污染: 68 phrases in 10 subjects |
| Business | 1 |
| Earth sciences | 5 |
| Ecology | 11 |
| Environment | 2 |
| Hydroelectric power stations | 2 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Technology | 37 |
| Water resources | 6 |
| Wind Energy | 1 |
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