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Title: Drysdale-Tinsley polyphase wattmeter [Go to resource]
Description: Drysdale-Tinsley polyphase wattmeter License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Creator: Tinsley,H. and Co. (maker) Identifier: 1952-357 Go to resource More Like this...
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