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Title: Oil-filled ceiling rose, incorporating "St [Go to resource]
Description: Oil-filled ceiling rose, incorporating "St. Helen's Corrosion-proof system" White's pat. No.22198/13; used in situations such as chemical works where sparks could cause fire License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1985-1064 Go to resource More Like this...
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