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Title: Duddell double high-frequency oscillograph serial no.2378 [Go to resource]
Description: Duddell double high-frequency oscillograph serial no.2378 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1904 Source: Science Museum Creator: The Cambridge Scientific Instrument Company Limited Identifier: 1962-253 Go to resource More Like this...-
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