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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6418966
    Disgrifiad
    Schematic drawing of the power house, housing the flywheels, at Penallta Colliery as published on p. 28 of Collieries of Wales: Engineering & Architecture by S. Hughes et al
    Enw Casgliad
    CWC - RCAHMW Collieries Publication Collection
    Cyfrwng
    Graphic.
    Cychwynnwr
    Stephen R. Hughes, RCAHMW
    Dyddiad
    1994 to 1995