Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Collection of tech. drawings re pit props
Engineering Drawing National Coal Board, South West Division, roof control department Diagram showing that steel props are 3 times stronger than timber props.
Pwnc
Diwydiant
Rhif yr Eitem
87.156I/6
Historical Associations
Associated Person/Body: National Coal Board, South Western Division
Association Type: Coal company
Derbyniad
collected officially, 14/8/1987
Mesuriadau
Meithder
(mm): 332
Lled
(mm): 407
Deunydd
papur
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.