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Title: Clarifone diaphragm type, 2000 ohms resistance, headphone ea [Go to resource]
Description: Clarifone diaphragm type, 2000 ohms resistance, headphone earpiece, c.1920 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1971-629 Go to resource More Like this...
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