World's longest undersea high
Source:politics Views: 【BigSmall】 Time:2024-05-21 16:59:15 Number of comments:
The massive tunnel boring machine named "Yongzhou", designed for the groundbreaking Jintang undersea tunnel project, rolls off the production line, Feb. 26, 2024 in Changsha, central China's Hunan Province. (Photo/China News Service)