Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Firedamp Drainage and trials with Cross-Measure Boreholes (booklet)
Information Bulletin No. 61/233. 10 pages and an appendix.
Pwnc
Diwydiant
Rhif yr Eitem
2018.42/189
Creu/Cynhyrchu
National Coal Board Production Department
Derbyniad
old stock, 26/1/2018
Mesuriadau
Meithder
(mm): 331
Lled
(mm): 204
Deunydd
Card
Paper
Metal
Dosbarth
health and safetyNid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.