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| 污水排放: 87 phrases in 18 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Aviation | 2 |
| China | 1 |
| Commerce | 1 |
| Drilling | 1 |
| Earth sciences | 1 |
| Ecology | 5 |
| Electronics | 1 |
| Engineering geology | 6 |
| Hydroelectric power stations | 2 |
| Metallurgy | 4 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Rail transport | 1 |
| Technology | 46 |
| United Nations | 1 |
| Water resources | 10 |
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