China Railway Õ¥Ö¼§ Heavy Industry has developed the machine – called Wushi - specifically for Shenzhen Metro Line 6. The company said that the general delivery speed for similar equipment in other companies is more than a year.
The equipment, which has an excavation diameter of 6.47m, will be used for a line that needs to pass Yangtai Mountain and multiple broken strata. The strata of rock surrounding the tunnel are complex and changeable, including a dry compressive strength of more than 100MPa.
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