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Keywords:
FRANCE,
ITALY,
EUROPE,
MONT CENIS,
ALPS,
MODANE,
BARDONNECHE,
TUNNELS,
GEOLOGY,
VENTILATION,
MASONRY,
TEMPERATURE,
TUNNELLING,
COSTS,
WORKS,
EXCAVATIONS,
GALLERIES,
MACHINERY,
MACHINES,
BORING,
COMPRESSED,
AIR,
PERFORATORS,
LABOUR,
RAILWAYS,
ROCKS,
CYLINDERS,
PERCUSSION,
ENGINES,
CYLINDERS,
DRIVING,
MOUNTAINS,
SOMMEILLER,
GRATTONI
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© Thomas Telford and ICE
1873
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