Name: Watch A86 : Le Défi d'un tunnel à double étage
Uploaded: 2023-06-07
Description: The Duplex A86 is a 10 kilometer underground highway buried more than 90 meters deep. This concrete tube, measuring the equivalent of more than 30 lying Eiffel towers, is the longest tunnel in France. The result of a succession of technical

A86 : Le Défi d'un tunnel à double étage

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