Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Dowlais Colliery, plan
Drawing showing the hot and cold blast connections for the No.ll Furnace at Dowlais.
Scale ¼" = one foot May 13.95
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.