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Code of Shaft Signals, notice
Notice bearing Code of Shaft Signals showing the number of 'knocks' that were to be used when descending and ascending the shaft.
Collection Area
Industry
Item Number
2017.35
Acquisition
Old stock, 23/2/2017
Measurements
Length
(mm): 425
Width
(mm): 250
Height
(mm): 2
Material
plastic
board
Location
In store
Classification
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