中国人把盾构机玩成了变形金刚

Group 1 - The core viewpoint of the article highlights China's significant advancements in shield tunneling technology, particularly the development of machines capable of variable diameter tunneling [1] - The "Qiming" shield machine completed a task in just 18 days that would typically take traditional machines five months, showcasing its efficiency [1] - The "Bianjing No. 1" machine can adjust its diameter from 8.83 meters to 12.45 meters, solving a technical challenge that has persisted for nearly 200 years in the industry [1]