Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Modern mining methods (booklet)
24 pages : illustrated throughout Content summary :- Advantages and description of the 'Seaman' chock self-advancing support system
Pwnc
Diwydiant
Rhif yr Eitem
1992.336/23
Derbyniad
Collected officially, 14/12/1992
Mesuriadau
Meithder
(mm): 280
Lled
(mm): 215
Deunydd
papur
Lleoliad
In store
Dosbarth
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