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    Archive Number
    6418909
    Description
    Measured drawing (permatrace) of transmission lines and the distribution of power to pits. As published on p. 16 of Collieries in Wales: Engineering and Architecture by S. Hughes et al
    Collection Name
    CWC - RCAHMW Collieries Publication Collection
    Medium
    Graphic.
    Originator
    Stephen R. Hughes
    Date
    1994 to 1995