 |
| |||
| 上半断面下部导坑掘进法隧道开挖方法之一,即在全断面开挖过程中,遇到地质条件不稳定的岩层时,可采用上半断面和下部导坑同时爆破掘进的开挖方法施工 | |||
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