Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Thermal Cracking, poster
'Shell The Oil Industry Chart 9' information poster showing the process of 'Thermal Cracking'.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
'Shell The Oil Industry Chart 9' information poster showing the process of 'Thermal Cracking'.