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Keywords:
GIE TRANSMANCHE CONSTRUCTION,
TUNNELS,
CHANNEL TUNNEL,
TOPOGRAPHY,
MEASUREMENT,
SATELLITES,
GYROTHEODOLITES,
INSTRUMENTS,
COMPUTERS,
SYSTEMS,
ACCURACY,
ALIGNMENT,
TUNNELLING,
UNDERWATER,
DRIVING,
SURVEYORS,
TBM,
BORING,
MACHINERY,
MAPS,
GLOBAL,
POSITIONING,
GPS,
GEOMETRY,
SHAFTS,
MODULES,
RECALIBRATION,
CORRECTIONS,
CHANNEL TUNNEL,
ENGLISH CHANNEL,
SANGATTE,
SHAKESPEARE,
CLIFF,
FRANCE,
UK
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© Thomas Telford and ICE
1994
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