 |
| |||
| 高压注水爆破煤矿中采用的爆破方法之一，也叫水封爆破。首先通过炮孔把高压水注人煤层中，然后在孔中装人耐水安全炸药，在孔口插进高压注水管〈带密封垫〉，在高压水的作用下进行爆破采煤 | |||
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