Guests view Baiyun Pioneer (China Railway 1188), China's first ultra-large diameter mud-water balancing shield machine used in high-speed rail underpass airport project, at a factory in Hangzhou, Zhejiang province, March 3, 2023. Baiyun Pioneer mud-water balancing shield machine with a diameter of 14.31 meters, a total length of about 115 meters and a total weight of more than 3,600 tons, will be put into use in the construction of Guangzhou-Zhuhai-Macao high-speed railway underpass Baiyun Airport T3 rail transit hub tunnel. It is the first large-diameter mud-water balancing shield machine for high-speed railway underpass airport project in China.
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