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Tunnel Technologies's Files
Korea ADD Tunnel Robot
By Ji-Yu DokoKorea ADD (Agency for Defence Development) Tunnel Robot photo copyright ADD
Patent doc: Method And Apparatus For Tunneling By Melting
By Tim AltmanUS Patent from 1972: Method And Apparatus For Tunneling By Melting
Ad Dar Al Bayda, Morocco
By Abbas ShakirAd Dar Al Bayda ("Casablanca"), Morocco image author Aymane fahssi via Wikimedia Commons
cover tunnel photo by: Matt Brown from London, England / CC BY
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