"Tunnel Flughafen Tegel" is 970 metres long. It was refurbished in 2008 where it got emergency lights and emergency exit signs. The walls were made of fibreglass-cement to protect it against fire.
"Tunnel Flughafen Tegel" is 970 metres long. It was refurbished in 2008 where it got emergency lights and emergency exit signs. The walls were made of fibreglass-cement to protect it against fire.
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