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Title: Sigma Specific Gravity Recorder, range 0 [Go to resource]
Description: Sigma Specific Gravity Recorder, range 0.9-1.1, Serial No. 9091, Sigma Instrument Co Ltd, Letchworth, England License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: c. 1960 Source: Science Museum Creator: Sigma Instrument Co Ltd Identifier: 1980-737 Go to resource More Like this...
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