Chinese mainland's first undersea subway tunnel starts operation
http://www.ecns.cn/news/society/2019-12-27/detail-ifzscrpe6237224.shtml
#China #Tunnel #Technology #CREG
The first undersea subway tunnel of China started official operation on Dec. 25 as southeast China’s Xiamen announced the opening of its metro Line 2.
cover tunnel photo by: Matt Brown from London, England / CC BY
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