Workers in China's Chongqing are using an advanced tunnel boring machine (TBM) to dig a new metro line. With just a controller in hand, they're advancing the tunnel by 14 meters every day. #China #Chongqing #TunnelBoringMachine #TBM #TunnelTech
Workers in China's Chongqing are using an advanced tunnel boring machine (TBM) to dig a new metro line. With just a controller in hand, they're advancing the tunnel by 14 meters every day. #China #Chongqing #TunnelBoringMachine #TBM #TunnelTech