Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Steel production by modern methods (cine film)
16mm, and black and white. Summary - Bar strip mill, bar rolling mill, strip rolling, cold strip rod mill 1951, wire drawing nails.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.