Watch how advanced, domestically-made machines are used to build a 14,625-meter-long high-speed railway tunnel in Shizhu County, southwest China's Chongqing. #China #Chongqing #tunnel #project #machinery
Watch how advanced, domestically-made machines are used to build a 14,625-meter-long high-speed railway tunnel in Shizhu County, southwest China's Chongqing. #China #Chongqing #tunnel #project #machinery
