Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Cefn Coed Colliery, steam flow and pressure curves (graph)
Printed in black, pink, green and yellow ink on off-white paper. A graph charting steam flow and pressure curves at Cefn Coed Colliery for Monday 23rd June, 1930 and Tuesday 24th June, 1930. 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'.
Pwnc
Diwydiant
Rhif yr Eitem
83.184I/67 (10)
Derbyniad
Collected officially, 20/12/1983
Mesuriadau
Meithder
(mm): 253
Lled
(mm): 720
Deunydd
papur
Lleoliad
In store
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.