 |
| |||
| section through rock | |||
|
岩石断面 : 5 phrases in 2 subjects |
| Earth sciences | 1 |
| Hydroelectric power stations | 4 |
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