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YouTubeTodayMachine
Inside the World’s Longest Railway Tunnel: Building Mega Structures Underground - Free Documentary
Have you ever wondered how the world’s longest and most advanced tunnels are built deep underground? 🌍 Join us on a thrilling journey beneath the earth as we explore the meticulous engineering behind high-speed rail tunnels, massive tunnel boring machines (TBMs), precision rail installations, and cutting-edge ventilation systems. Discover ...
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