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Keywords:
DRAINAGE,
VALLEYS,
TUNNELS,
CUTTINGS,
CANALS,
LAKES,
EXCAVATIONS,
DREDGERS,
DREDGING,
CABLEWAYS,
RAILWAYS,
BRIDGES,
WORKS,
EXCAVATING,
CONTROL,
LEVELS,
WATER,
SEWERAGE,
SEWAGE,
BUCKETS,
MEXICO CITY,
MEXICO,
LATIN AMERICA,
CENTRAL AMERICA
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© Thomas Telford and ICE
1901
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