It weighs approximately 5,000 metric tons (11 million pounds ... achievement in the industrialization of 16-meter-class, large-diameter tunnel boring technology in China.

China has completed the production of its largest tunnel-boring machine (TBM), measuring 16.64 meters (54.5 feet) in diameter. The machine is named Jianghai, which means "river and ocean" in Chinese.

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A large-diameter tunnel boring machine (TBM) with a record-breaking excavation diameter of 16.64 meters rolled off the production line in Changsha, Central China's Hunan Province on Thursday.

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