China's longest expressway shield tunnel drilled through

0 Comment(s)Print E-mail Xinhua, August 22, 2023

This photo taken on Aug. 21, 2023 shows the shield-tunneling machine at the construction site of China's longest expressway shield tunnel project, in Beijing, capital of China. The tunnel, with a total length of 7.4 km, was drilled through on Monday. (Xinhua/Ju Huanzong)

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