Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Collection of tech. drawings re pit props
Engineering Drawing National Coal Board, South West Division, roof control department Method of measuring bed separation, showing height loss in inches
Pwnc
Diwydiant
Rhif yr Eitem
87.156I/1
Derbyniad
Collected officially, 14/8/1987
Mesuriadau
Meithder
(mm): 286
Lled
(mm): 396
Techneg
dyeline
Deunydd
papur
Lleoliad
In store
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.