Nation’s largest TBM rolls off assembly line
China’s self-developed tunnel boring machine with the biggest diameter is rolled off the production line in Changsha, Central China’s Hunan province, Oct 31, 2024. [Photo/Xinhua] China’s largest tunnel boring machine — with a diameter of 16.64 meters — rolled off the production line in Changsha, Hunan province on Thursday. The machine, weighing around 5,000 metric…









