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Keywords:
SUBAQUEOUS,
UNDERWATER,
TUNNELLING,
PLANT,
SHIELDS,
MACHINERY,
RAILWAYS,
RIVERS,
BAKERLOO LINE,
UNDERGROUND,
TUNNELS,
TUBES,
CYLINDERS,
BOILERS,
THAMES,
LONDON,
ENGLAND,
BAKER STREET,
WATERLOO,
BAKERLOO LINE,
UK
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© Thomas Telford and ICE
1902
