Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Trailing Cables for Mines and Quarries (booklet)
52 page publicity booklet describing the design and use of the cables.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
52 page publicity booklet describing the design and use of the cables.