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Keywords:
TUNNELS,
CONSTRUCTION,
CAST,
DRIVING,
TREATMENT,
AIR,
BONES,
TRAFFIC,
SECONDARY,
STRAIN,
WALLS,
SERVICES,
IRON,
GROUND,
HAZARDS,
HEALTH,
LESIONS,
SHIELDS,
DECOMPRESSION,
GAUGES,
DESIGN,
PROBLEMS,
LININGS,
CONDITIONS,
COMPRESSED,
WORKERS,
TUNNELLING,
GIRDERS,
GROUTS,
PVC,
CLYDE,
SCOTLAND,
UK
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© Thomas Telford and ICE
1967
