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Keywords:
SIGNALLING,
BLOCKS,
WORKING,
RAILWAYS,
SIGNALS,
INSTRUMENTS,
ELECTRIC,
STATIONS,
DOUBLE,
LINES,
INTERLOCKING,
SYSTEMS,
JUNCTIONS,
AUTOMATIC,
POWER,
PROTECTION,
LEVEL CROSSINGS,
ORGANISATION,
MANUFACTURE,
STANDARDISATION,
APPLIANCES,
DEPARTMENTS,
INDIA,
ASIA,
EAST INDIAN & EASTERN BENGAL RAILWAYS,
THE GREAT INDIAN PENINSULA RAILWAY,
THE SOUTH INDIAN RAILWAY
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© Thomas Telford and ICE
1933
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