 |
| |||
| 水源保护区; 水资源保护区 | |||
| water protection zone: 7 phrases in 5 subjects |
| Desert science | 1 |
| Ecology | 1 |
| Rail transport | 3 |
| Technology | 1 |
| Water resources | 1 |
|
| |||
| 水源保护区; 水资源保护区 | |||
| water protection zone: 7 phrases in 5 subjects |
| Desert science | 1 |
| Ecology | 1 |
| Rail transport | 3 |
| Technology | 1 |
| Water resources | 1 |