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Rock MassEnglish SummaryRailway LineTunnel ConstructionRock ConditionsSqueezing RockSupport MeasuresGotthard Base TunnelShotcrete LiningGeological and HydrogeologicalTunnel ExcavationTunnel BoringTunnel FaceTunnel ProjectRailway TunnelsConstruction WorksUnderground RailwayGround WaterTunnel DrivingUnderground Structures
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