 |
| |||
| 塌陷煤盆地地下深处或含煤岩系基底的石灰岩、白云岩受地下水长期的溶蚀作用引起地表塌陷而成的煤盆地 | |||
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