The domestic 15-meter super-large diameter mud-water balance shield machine "Zhijianghao" is officially rolled off the production line at the China Railway Factory in Hangzhou, Zhejiang Province, China, May 9, 2021. The excavated shield machine has a diameter of more than 15 meters, weighs 4,300 tons and is about 120 meters long, making it the largest shield machine project in diameter in East China, including Zhejiang Province.
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