diversion tunnel and spillway tunnel
option of separate highway tunnel and Metro tunnel
Part-tunnel and Part-roadbed Type Tunnel
power tunnel and tailrace tunnel system
railway tunnel under crossing the highway tunnel
Shield Tunnel and Rock Tunnel
water tunnel and salt tunnel
heat balance thermal balance
material balance and thermal balance
Mental balance or balance of mind
’South bridge and north tunnel’ option
1600℃ energy-saving gas tunnel kiln
3D monitoring of tunnel slope deformation