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
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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
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