Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Hydraulic pumping engine, plan
Plan of hydraulic pumping engine, Bedwellty Pits, Tredegar. Scale 1½ inches to a foot and ½ full size - Valve chest
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.