Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Cefn Coed Colliery, steam consumption curve (graph)
Handwritten in silver pen on grey graph paper. Graph entitled 'Cefn Coed Colliery 3000 kw. H.P turbo generator steam consumption curve.' Loose within a green card file with all other documents with accession number 83.184I/67. The file is labelled 'Colliery Boiler Plant B31', 'Cefn Coed Data' and 'Colliery Engineering'.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.