 |
| |||
| 坳陷煤盆地由于地壳坳陷而成。含煤岩系基底呈波状起伏断裂不发育的煤盆地 | |||
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