’South bridge and north tunnel’ option
1600℃ energy-saving gas tunnel kiln
3D monitoring of tunnel slope deformation
a little spacing tunnel
a shallow mined large-span crossover tunnel
abrupt changes in the cross-sectional area of a tunnel
Access Tunnel
刷引线
辅助隧洞
引水隧洞
隧道通道
交通隧洞
横洞
人员进出地道
通道
进口隧道
隧道
Access Tunnel to Powerhouse
Acute carpal tunnel syndrom
adaptive-wall wind tunnel
additional air resistance in tunnel