Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Pit Ventilation (booklet)
33 page illustrated booklet, stapled at centre. Content summary - reasons for mine ventilation, the devices used to ventilate mines and monitor air flow.
Pwnc
Diwydiant
Rhif yr Eitem
2001.1/812
Mesuriadau
Meithder
(mm): 152
Lled
(mm): 202
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.