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Title: Triode valve holder box, probably by Unilab [Go to resource]
Description: Triode valve holder box, probably by Unilab, complete with Mullard EC90 triode valve License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1956-1969 Source: Science Museum Creator: Unilab (maker) Identifier: 1983-1240 Go to resource More Like this...
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