PDF(1048 KB)
PDF(1048 KB)
PDF(1048 KB)
山区铁路隧道超长定向钻探关键技术研究
Research on the Key Technology of Ultra Long Directional Drilling in Railway Tunnel in Mountainous Area
| {{custom_ref.label}} |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
/
| 〈 |
|
〉 |