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Construction of Korea's longest tunnel in the city of Busan was completed this week, spanning more than 20 km.
The national rail builder unveiled the 20.3-km tunnel connecting the Nopo district with Busanjin Station through Geumjeong Mountain on Friday.
The tunnel is located more than 300 m below ground and the width and height of the tunnel measures up to 14 m and 12 m, respectively.
This is part of the government's Seoul-Busan Express Railway project, in which the country's high-speed rail, KTX, began operating from Seoul to Busan in 2004.
The second phase of construction is to replace the tracks between Daegu and Busan by 2012.
Arirang News
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