 |
| |||
| 下降水位 | |||
|
falling water table : 5 phrases in 5 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Oceanography & oceanology | 1 |
| Refrigeration | 1 |
| Technology | 1 |
|
| |||
| 下降水位 | |||
|
falling water table : 5 phrases in 5 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Oceanography & oceanology | 1 |
| Refrigeration | 1 |
| Technology | 1 |