For the first deep-level tube line, the City and South London Railway, two diameter circular tunnels were dug between Moorgate terminus in the City and had diameter tunnels.
12.
The Deep level tube lines open at that time ( City & South London Railway, Waterloo & City Railway and Central London Railway ) had been electrically powered from the start.
13.
The deep-level tube lines open at that time ( City & South London Railway, Waterloo & City Railway and Central London Railway ) had been electrically powered from the start.
14.
The deep level tube lines open at that time ( City and South London Railway, Waterloo and City Railway, and Central London Railway ) had been electrically powered from the start.
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The trains are wider than the 1967 Stock to take advantage of the Victoria line's loading gauge, which is slightly larger than those of other deep-level tube lines.
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Between 1923 and 1934 Standard stock with air-operated doors replaced gate stock on London's deep-level tube railways, improving access to the cars so reducing boarding times.
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Although now only served by deep-level tube trains, the section of line serving the station is built to surface gauge, and trains to that larger LU loading gauge occasionally pass through.
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Following construction of deep-level tube tunnels between Wembley Park were transferred to the Bakerloo line on 29 November 1939 . The Bakerloo line service was transferred to the Jubilee line on 1 May 1979.
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This person is talking about the London Underground ( familiarly " the Tube " ) and specifically its deep-level tube lines ( the only ones that are " tube lines " in strict usage ).
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It would also be good if the word'Tube'is only used to inform readers of the difference between'deep level tube'and'sub-surface'on the whole of Wikipedia.
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