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United Kingdom: HS2 innovative tunnel portal to prevent sonic booms from happening

United Kingdom: HS2 innovative tunnel portal to prevent sonic booms from happening
By Kris Lubcek

United Kingdom: HS2 innovative tunnel portal to prevent sonic booms from happening

source: https://mediacentre.hs2.org.uk/news/unique-hs2-tunnel-portal-extensions-completed-to-crack-high-speed-rails-sonic-boom-conundrum

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HS2 Project (High Speed 2)

HS2 Project (High Speed 2)

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cover tunnel photo by: Matt Brown from London, England / CC BY

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