China's largest shield tunneling machine rolls off the production line

Massive 410-foot tunneling machine rolls out with 54.7-foot diameter

China has rolled out its largest-diameter domestically developed shield tunneling machine, measuring 54.7 feet across and weighing 5,291 tons.

China's largest shield tunneling machine rolls off the production line

China's largest shield tunneling machine rolled off the production line on Tuesday in Zhengzhou, central Henan Province.The domestically developed "China Railway 1662" has a massive 16.68-meter excavation diameter and a body 125 meters long.

China rolls out largest domestically developed shield machine

China's largest domestically developed shield machine rolled off the production line in Zhengzhou, central China’s Henan Province, on Tuesday.