Category:Tunnel ventilation in Switzerland
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This category has the following 2 subcategories, out of 2 total.
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Media in category "Tunnel ventilation in Switzerland"
The following 3 files are in this category, out of 3 total.
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Gotthard Road Tunnel - Ventilation Center Bäzberg (14986518904).jpg 4,336 × 2,890; 4.92 MB
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Gotthard Road Tunnel - Ventilation Center Bäzberg (15608103582).jpg 4,352 × 2,904; 4.47 MB