((Titel - Tunnel 4-5/2017))
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4–5
August
2017
Breakthrough at the Belchen Renovation Tunnel 8
Jaipur Metro Excavation: Settlement Reduction 10
Albula Tunnel II: Ground Freezing 18
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Breakthrough at the Belchen Renovation Tunnel │ Jaipur Metro Excavation: Minimal Settlement under historical City Gate │ Albula Tunnel II:...