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The Xingding shield tunnel of China Railway 12th Bureau Group successfully completed the 1750 meter shield tunnel in 142 days, with the assistance of Tianyou cutting tools and tail brushes throughout the entire process

Author:PV:126 Time:2023-09-01

The Xingding shield tunnel of China Railway 12th Bureau Group successfully completed the 1750 meter shield tunnel in 142 days, with the assistance of Tianyou cutting tools and tail brushes throughout the entire process