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Keywords:
VENTILATION,
WORKING,
RAILWAYS,
TUNNELS,
FRESH,
AIR,
COMPOSITION,
IMPURITIES,
POLLUTION,
COMBUSTION,
CARBONIC,
ACID,
ARTIFICIAL,
NATURAL,
COAL,
COKE,
FANS,
SHAFTS,
MACHINES,
MACHINERY,
PROPERTIES,
ENGINES,
LOCOMOTIVES,
PNEUMATIC,
ROPES,
GASES,
STEAM,
FUEL,
OXIDES,
OXYGEN,
VAPOUR,
CURRENTS,
FLOW,
VENTILATORS,
TUBES
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© Thomas Telford and ICE
1876
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