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Title: Wooden plug and socket patented by Killingworth Hedges 1880 [Go to resource]
Description: Wooden plug and socket patented by Killingworth Hedges 1880 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: electric sockets Source: Science Museum Identifier: 1985-953 Go to resource More Like this...
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