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Machine Breaks Out Last Bit in Longest Tunnel
Machine Breaks Out Last Bit in Longest Tunnel.
Machine Breaks Out Last Bit in Longest Tunnel
Switzerland - Workers break through last bit of rock in world's longest tunnel
INCREDIBLE SWITZERLAND BIGGEST TUNNEL BORING MACHINE DIAMETER-HOW DOES TUNNEL BORING MACHINE WORK?
Joyous Swiss Hail Longest Tunnel Breakthrough
Switzerland has its record-breaking tunnel
Swiss complete world's longest tunnel Congradulation from PlumberX
Swiss celebrate longest tunnel breakthrough
Historic breakthrough for HS2’s longest tunnel
The Insane Scale of Europe’s New Mega-Tunnel
Moment machine digging HS2’s longest tunnel breaks through after 10-mile journey
