State media said both CRCHI machines would be used to drill the Jintang undersea tunnel, a railway channel about 10 miles long that runs as deep as 255 feet below the seabed.
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://www.businessinsider.nl/china-unveiled-new-dragon-themed-drillers-that-it-hopes-will-build-the-worlds-longest-undersea-high-speed-railway-tunnel/
China unveiled new dragon-themed drillers that it hopes will build the world's 'longest undersea high-speed railway tunnel'
www.businessinsider.nlChina just showed off its second dragon-themed tunneller, which it said will drill an undersea railway.It's touted by China as the world's longest