The first shaft of the world’s longest tunnel is completed.
The Seikan Tunnel, 53.85 km (33.46 mi) in length, connects the Japanese islands of Honshu and Hokkaido.
The first shaft of the world’s longest tunnel is completed.
The Seikan Tunnel, 53.85 km (33.46 mi) in length, connects the Japanese islands of Honshu and Hokkaido.
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