Tunnel Engineering


China Railway Fourth Bureau

Shenhua Junchi Railway Killing Hukou Tunnel Management Department

Pier column template / small shelter hole template

China Railway 13th Bureau

Dalian Metro 202 Section Project

Trolley truss / hydraulic part

China Railway 14th Bureau

17 contract section of Beijing Metro Line 14

Trolley steel mold 9 m / hydraulic and walking system

China WorldCom Heavy Industry

Mazhu high-speed mztj-4 contract section project

Tunnel lining trolley 12m/9m