Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
The Gullick Seaman Remotely Controlled Powered Supports (booklet)
Content summary - details of the project by the National Coal Board's Mining Research Establishment to develop and test remotely operated powered roof support equipment. 11 pages, stapled. Illustrated throughout. Undated.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.