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Tunnel ventilation shafts
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Subcategories
This category has the following 3 subcategories, out of 3 total.
C
Canal tunnel ventilation shafts
(1 C, 7 F)
R
Rail tunnel ventilation shafts
(7 C, 4 F)
S
Tunnel ventilation shafts in Switzerland
(1 C, 8 F)