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Keywords:
DESIGN,
PRESSURE,
TUNNELS,
SHAFTS,
UNDERGROUND,
HYDROELECTRICITY,
POWER STATIONS,
CONCRETE,
LININGS,
STEEL,
ANCHORAGES,
ROOFS,
BOLTING,
COSTS,
TUNNELLING,
STATIONS,
FORCACAVA,
KEMANO TUNNEL,
BRITISH,
COLUMBIA,
MALGOVERT,
BRAZIL,
CANADA
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© Thomas Telford and ICE
1955
