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  Ryfast

  ...uthwest of Norway. Ryfast tunnels connects Stavanger (the fourth largest city in Norway) with the other sid...ters below the sea level. Hundvåg Tunnel It lies between the city of Stavanger and the island o...

  1571 days ago

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  How much does a Tunnel Boring Machine (TBM) cost?

  ...shield mixed ground TBM that you use in uninhabited areas is usually the lowest. On the other hand, if you need to bore a tunnel under a sprawling city center, you'd better use...

  135 days ago