 |
| |||
| 柱状药包爆破用长度与直径之比大于 6 的药包进行的爆破作业。如不特指，浅孔爆破、中深孔爆破和深孔爆破均为柱状药包爆破。条形硐室爆破也属此类 | |||
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