Fire extinguishing at Qingdao Hongdao Station of Jinan-Qingdao High Speed Railway
The Guanjiao Tunnel is the longest high-rise tunnel in the world and the longest tunnel in China.
Qinling Tunnel Heating
Yanchong Expressway, Xingyan Expressway, Zhangshi Expressway, Heyu Expressway, etc. D.
Anti-freezing of water pipes of metro lines R1/R3
Pipeline electric heating system for the first phase of the project of Shijiazhuang metro lines 1, 2 and 3!