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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6405103
    Disgrifiad
    Colour slide showing valve of spring inside the Severn Railway Tunnel, photographed by Douglas Hague, Oct 1969.
    Enw Casgliad
    DBHSC - D.B. Hague Slide Collection
    Cyfrwng
    Photo.
    Cychwynnwr
    Mr Douglas B. Hague, RCAHMW
    Dyddiad
    1969-10