Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Water balance, film slide
Mock shafts for water balance (project not continued), Big Pit Mining Museum, August 1983.
Pwnc
Diwydiant
Rhif yr Eitem
2015.48/1121
Mesuriadau
Meithder
(mm): 50
Lled
(mm): 50
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.