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Keywords:
METHODS,
REMOVAL,
ROCKS,
UNDERWATER,
DEEPENING,
HARBOURS,
ENTRANCES,
CHANNELS,
CANALS,
BLASTING,
ENLARGEMENT,
EXPERIMENTS,
HOLES,
DRILLING,
EXPLOSIVES,
NITROGLYCERINE,
PORT COLBORNE,
WELLAND,
CANADA
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© Thomas Telford and ICE
1885
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