Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Oakeley slate quarry, photograph
Hammering the 'plug and feathers' - a balanced wedge used to start a crack along the cleavage - so that a block can be set free.
Pwnc
Diwydiant
Rhif yr Eitem
52.465/20
Mesuriadau
Meithder
(mm): 300
Lled
(mm): 252
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.