A door from the tunnel station to the emergency-stop station or the other way round. The weight is about 700 kg. It resists a temperature of 200°C for 45 minutes. Switzerland, Sep 15, 2016. (8/26)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/70981241@N00">Kecko</a> from Rural area, Eastern Switzerland
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/kecko/29223194233/">SBB - Gotthard Base Tunnel GBT</a>