Drilling of one of the most difficult tunnels of iron roads China-Laos] is complet

Beijing, on June 22, 2020, 05:53 — information agency "REGNUM" Company China State Railway Group Co. Ltd Guangzhou Engineering Group (CRECGZ) drilled a railway tunnel Bang Nakok who China-Laos became the tunnel of iron roads second for length, reports on June 21 information agency "Sinkhua". The tunnel Bang Nakok 9296 meters long is located in...