bn:14815288n
Noun Concept
Categories: Base tunnels, Mountain tunnels
EN
base tunnel
EN
A base tunnel is a type of tunnel, mainly a railway tunnel, that is built through the base of a mountain pass. This type of tunnel typically connects two valleys at about the same altitudes. Wikipedia
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EN
A base tunnel is a type of tunnel, mainly a railway tunnel, that is built through the base of a mountain pass. This type of tunnel typically connects two valleys at about the same altitudes. Wikipedia
A type of tunnel that is built through the base of a mountain pass Wikidata
Wikipedia
Wikidata