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結果 : which is the longest tunnel in the world
28:20

15 LONGEST TUNNELS in the World

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How Europe's Building the World's Longest Underwater Tunnel!

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China's Xinjiang completes world's longest expressway tunnel

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The Laerdal Tunnel: The Longest Road Tunnel in the World

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China's Xinjiang completes world's longest expressway tunnel through challenging Tianshan Mountains

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Switzerland Built the World's Longest Tunnel

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How the world longest underwater tunnel was built

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The World's Deepest Man-made Hole 😱

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How the world's longest underwater tunnel was built - Alex Gendler

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Going Through The World's Longest Tunnel - St. Gotthard Tunnel - Switzerland

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This Is the Longest Tunnel in the World

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The Impossible Construction of World's Longest Undersea Tunnel

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What is the longest tunnel in the world?

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China's Xinjiang Completes World's Longest Expressway Tunnel through Challenging Mountains

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