Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Reports of tests to prevent overwinding, Six Bells Colliery
"Book for Reports of Tests of the Automatic Contrivance to Prevent Overwinding". Six Bells Colliery, 1986-1987.
Pwnc
Diwydiant
Rhif yr Eitem
2015.73/1
Mesuriadau
Meithder
(mm): 212
Lled
(mm): 150
Uchder
(mm): 5
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.