Скачать или смотреть Inside the World’s Longest “UnderMoutain” Tunnel: How China Builds 20 km Mountain Tunnels That Shock

Welcome to the heart of the world’s longest "Under-Mountain" tunnel. While most countries take decades to plan, China is carving through massive mountain ranges at a speed that has left global engineers in total shock.

In this video, we go INSIDE the restricted zones of China’s most ambitious mega-projects. You’ll witness:

🤖 The "Iron Monsters": Massive TBM machines that chew through miles of granite.

🔥 Extreme Conditions: How workers survive 40°C heat and high-pressure water bursts miles underground.

⚡ The Secret "China Speed": The controversial and brilliant engineering tactics used to finish projects years ahead of schedule.

Is this the future of global travel or a dangerous engineering gamble? Let’s dive deep into the darkness.

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