Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Collection of eng./tech. drawings re coal cutting
Coal Cutting Machinery Plans and Drawings (from George Tucker Jones, Pontyclun)
Engineering Drawing : Tracing
Clamping device (no details)
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.