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Title: Nomal 2B noise measuring unit serial no [Go to resource]
Description: Nomal 2B noise measuring unit serial no.1703, marked `Dataforce' in weatherproof case, with power and battery leads and microphone mounting rod (Dataforce later became Digitronix) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1960-1979 Source: Science Museum Creator: Dataforce (maker) Identifier: 1992-853 Go to resource More Like this...
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