68 Days
Source:
أخبار الصين
First Chinese large-diameter tunnel machine for Saudi Arabia completed
The first large-diameter tunnel boring machine produced in China has been manufactured for export to Saudi Arabia. It will be used in the extension project of Riyadh's Line 2 metro. The cutter head has a diameter of 11.16 meters and a length of 105 meters. It will be employed to bore tunnels over a distance of 6 kilometers, with advanced technical modifications being implemented to address geological challenges by enhancing corrosion resistance and adapting to complex conditions.
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