The right line section of Changchun Metro Line 2, Area 4, constructed by China Railway Construction Corporation, was smoothly connected without tool replacement throughout the entire process. All tools were provided by Shandong Tianyou Tunnel Engineering Equipment Co., Ltd. with the assistance of Tianyou tools, and the connection was smooth
China Railway Construction Bridge Bureau Guangzhou Line 18-22, Division 6, Double Line Departure in Sha Shi District, with Tianyou providing all the cutting tools and tail brushes, achieved a good result of 2347 meters without changing the cutting tools a
China Railway 14th Bureau Beijing East Sixth Ring Road Project. Since its inception, the domestically produced 16 meter diameter shield tunneling machine Jinghua has steadily excavated, successfully crossing multiple risk sources such as the Happy Song
