Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Drainage of Firedamp from Mines (report)
'Report by the Ministry of Fuel and Power and National Coal Board Joint Working Party on the Drainage of Firedamp from Mines'. 83 pages, stapled.
Pwnc
Diwydiant
Rhif yr Eitem
2018.181/23
Mesuriadau
Meithder
(mm): 330
Lled
(mm): 204
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.