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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

Author:PV:80 Time:2023-09-01

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