Domestically made tunnel boring machine Zhenxing started its work and began excavating the tunnel of Heyan road through Yangtze River in Nanjing city. This is the first time a domestically developed tunnel boring machine to work through Yangtze River.
http://english.www.gov.cn/news/photos/201912/26/content_WS5e040f75c6d0bcf8c4c197e2.html
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cover tunnel photo by: Matt Brown from London, England / CC BY
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