Meet Bertha, the world's largest-diameter tunnel boring machine. Bertha was built in Japan and reassembled in the U.S. The machine has its own electric power source, so its 25,000-horsepower engine won't disrupt the local grid.
Tuesday 12 November 2013
The World's Largest Tunnel-Boring Machine
Meet Bertha, the world's largest-diameter tunnel boring machine. Bertha was built in Japan and reassembled in the U.S. The machine has its own electric power source, so its 25,000-horsepower engine won't disrupt the local grid.
Subscribe to:
Post Comments (Atom)
0 comment(s):
Post a Comment