Linghang, better known as the world’s largest-diameter high-speed railway shield tunneling machine, crossed the 6.2-mile (10,000-meter) tunneling milestone on Tuesday, as reported by the China Media ...
Add Yahoo as a preferred source to see more of our stories on Google. Watch how workers assemble a giant shield machine inside the Longgang Tunnel on the Shenzhen-Shenshan high-speed railway.Hundreds ...
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