China's Giant tunnel boring machines are used to excavate the ground using a circular cross section that drills through a variety of ground soil or rocky earth to produce subway tubes, tunnels for railways and many more.
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Watch The World's Biggest Tunnel Boring Machines From The USA And China.
In this video, you'll see Giant Tunnel Boring Machines. These so-called tunnel boring machines are so great when it comes to digging the ground because, they are much safer to...