The first large-diameter double-mode shield machine in Guangdong, Hong Kong and Macao Bay Area of China Railway Fifth Bureau's Shenzhen-Dalian Intercity Project and China Railway Shanhe was launched.
The first large-diameter double-mode shield machine in Guangdong, Hong Kong and Macao Bay Area of China Railway Fifth Bureau's Shenzhen-Dalian Intercity Project and China Railway Shanhe was launched.