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Title: 18 x 12 matrix of reed relays from TXE4 exchange equipment [Go to resource]
Description: 18 x 12 matrix of reed relays from TXE4 exchange equipment (see note) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1976-316 Go to resource More Like this...
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