site stats
The first peek into fully automated tunneling ⚫At the end, you can see the hydraulic rams that push the rotary drill face forward and the rotary jig that places pre-formed concrete tiles at the forward edge of an expanding cylindrical tunnel.More:
发布时间:
1
数据加载中
Markdown支持
评论加载中...
您可能感兴趣的: 更多