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Amgueddfa Cymru – Museum Wales
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Collection of tech. drawings re pit props
Engineering Drawing National Coal Board, South West Division, roof control department Method of measuring bed separation, showing height loss in inches
Collection Area
Industry
Item Number
87.156I/1
Acquisition
Collected officially, 14/8/1987
Measurements
Length
(mm): 286
Width
(mm): 396
Techniques
dyeline
Material
paper
Location
In store
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