短螺旋钻机钻孔成桩工艺
Drilling-into-pile techniques by the Short Spiral Drill
紧邻多孔隧道
adjacent multiple tunnels
三车道隧道
Three-lane Highway Tunnel
双孔隧道窑
Double-hole tunnel furnace
隧道机电监控系统
tunnel electronic monitor and control system
隧道机电系统
tunnel electromechanical system