HEFEI, Dec. 10 (Xinhua) -- At the installation site of box girders of a high-speed railway linking Shanghai, Nanjing of Jiangsu Province, and Hefei of Anhui Province in east China, builders precisely completed their tasks on Tuesday by seizing the time window when no trains passed under the bridge.
FlyOverChina | Time-lapse: busy installation site of box girders of high-speed railway in E China's Anhui
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