 |
| |||
| 透水层 | |||
| 可透层 | |||
|
permeable layer : 7 phrases in 3 subjects |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 2 |
| Technology | 3 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips