That being said, it does hold one Chinese record: It's the largest dual-shield hard rock TBM China has ever built at 590 ft (180 m) and weighing in at 7.8 million pounds (3.54 million kg).

SHANGHAI, Feb. 13, 2020 /PRNewswire/ -- ESAB Welding & Cutting Products has launched Dual Shield® Prime, a family of seamless, low-hydrogen (H4) non-copper-coated flux cored wires that combat ...

China's largest-diameter dual-shield, self-developed TBM (Tunnel Boring Machine), the "Jianghan Ping'an," was launched on Sunday in Yichang, Central China's Hubei Province, as part of a project to ...