Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Bergleau Museum, Bochum, Photograph
Model showing orientation of holes cementation of soft ground for shaft sinking, Mining Musuem Bochum,
Pwnc
Diwydiant
Rhif yr Eitem
62.140/26
Mesuriadau
Meithder
(mm): 234
Lled
(mm): 176
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.