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Title: Sectioned sample of 12pr/40lb Gutta-percha insulated cable i [Go to resource]
Description: Sectioned sample of 12pr/40lb Gutta-percha insulated cable in cast iron pipe, from Gloucester, c. 1867 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1867 Source: Science Museum Identifier: 1970-492 Go to resource More Like this...
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