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Title: Philips moving-iron cone loudspeaker, type 2119, in polygona [Go to resource]
Description: Philips moving-iron cone loudspeaker, type 2119, in polygonal bakelite casing, 1929 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1984-215 Go to resource More Like this...
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