China, new milestone in the work of the high-speed line Xi'an-Chongqing
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Facing underground rivers and flammable natural gas, the workers took a decisive step in the realization of the Zhujiashan tunnel through the Daba mountains in China. The finish line, reached on September 8, marks a further step towards the completion of the high-speed railway line Xi-Chongqing. (XINHUA/ITALPRESS) mec/lcr (video source: Xinhua)