| |||
| 污染防治 | |||
|
Prevention and Control of Pollution : 34 phrases in 7 subjects |
| China | 7 |
| Ecology | 8 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 14 |
| United Nations | 1 |
| Water resources | 2 |
| |||
| 污染防治 | |||
|
Prevention and Control of Pollution : 34 phrases in 7 subjects |
| China | 7 |
| Ecology | 8 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 14 |
| United Nations | 1 |
| Water resources | 2 |