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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6210580
    Disgrifiad
    Measured cross-section drawing of Hetty Pit Winding Engine House at Gyfeillion Colliery produced by Geoff Ward, 2001.
    Enw Casgliad
    Drawings Collection
    Cyfrwng
    Graphic.
    Cychwynnwr
    Mr Geoff A. Ward, RCAHMW
    Dyddiad
    2001-11-15