Can there really be that many tunnel boring machines working at once for Paris metro?
"Fifteen of those machines are at the moment scraping the Ile-de-France underground to cowl the 205 kilometers of the Grand Paris Express metro."
https://ourbitcoinnews.com/grand-paris-express-libe-takes-the-pulse-of-the-tunnel/
Put into service within the subsequent ten years, the brand new Ile-de-France metro is making its gap within the basements of the area. Tunnel pilots…
cover tunnel photo by: Matt Brown from London, England / CC BY
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