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Tokyo Flood Prevention | Insane underground tunnel system in Japan!

Fifty metres under Tokyo lies a subterranean world — 6.4 kilometres of tunnels, water tanks and massive pillars constructed to withstand 200 tonnes of water per second. This engineering marvel built to protect the ever-present threat of Tokyo flooding.

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Видео Tokyo Flood Prevention | Insane underground tunnel system in Japan! канала ABC Science
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28 октября 2014 г. 12:08:04
00:12:15