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Underground StructuresCompressed AirUnderground ConstructionSoft WaterSoft GroundCivil EngineeringUnderground RailwayEnvironment ProtectionUnderground SpaceUnderground StorageTunnel ConstructionEarthquake DamageLarge Cross Section ExcavationEnergy EconomyPublic TransportationConstruction WorkUnderwater Pipe JackingWater TunnelDistrict HeatingHydraulic Boring Machine