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Title: Duddell oscillograph element no. 134185, by Muirhead and Co. [Go to resource]
Description: Duddell oscillograph element no. 134185, by Muirhead and Co. Ltd. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Duddell Source: Science Museum Creator: Muirhead and Company Limited Identifier: 1989-1082 Go to resource More Like this...
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