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Featuring a 221-meter curved vault with a 25.2-meter span, the arched design of Chengdu's first pillar-free subway station on Line 13 maximizes interior space and ensures balanced structural force distribution.The line will play a key role in establishing Chengdu's core rail network.(Photo/China Youth Daily)
#ChinaMetro #Infrastructure #Chengdu
By Fu Rui, Zhang Weiyi(intern) and Wang Zhiyuan/China Youth Daily
来源：中国青年报客户端
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