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Keywords:
TUNNELS,
RIVERS,
CABLES,
ELECTRICITY,
SUPPLY,
POWER,
ENERGY,
COUNTRIES,
DEVELOPING,
TUNNELLING,
SINKING,
SHAFTS,
UNDERPINNING,
COMPRESSED,
AIR,
WELLS,
SUBSOIL,
SHIELDS,
DRIVING,
IRON,
LININGS,
SHIELD DRIVEN,
TRIAL,
BORING,
OVERSEAS,
CONTRACTORS,
TENDERS,
COSTS,
PLUGS,
KENTLEDGE,
STRATA,
CLAYS,
RIVER HOOGLY,
CALCUTTA,
INDIA,
ASIA
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© Thomas Telford and ICE
1933
