Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Ventilation for dust control in headings (booklet)
26 page booklet in orange and white covers, stapled at centre. Notes of guidance for an undergound official.
Pwnc
Diwydiant
Rhif yr Eitem
2001.1/827
Mesuriadau
Meithder
(mm): 210
Lled
(mm): 148
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.