Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Collection of tech. drawings re pit props
Engineering Drawing National Coal Board, South West Division, roof control department Showing main causes of wastage of timber in mines and the estimated proportion lost from each cause
Pwnc
Diwydiant
Rhif yr Eitem
87.156I/9
Historical Associations
Associated Person/Body: National Coal Board, South Western Division
Association Type: Coal company
Derbyniad
collected officially, 14/8/1987
Mesuriadau
Meithder
(mm): 530
Lled
(mm): 475
Deunydd
papur
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.