China’s Longest Tunnel Built with a Shield Machine
China has excavated a new 7.4 km expressway tunnel in Beijing on August 21, which is expected to feature 6 lanes for two-way traffic.China excavates an expressway tunnel in Beijing ...
China has excavated a new 7.4 km expressway tunnel in Beijing on August 21, which is expected to feature 6 lanes for two-way traffic.China excavates an expressway tunnel in Beijing ...
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