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Title: Marchant "calculating twin" mechanical calculating machine, [Go to resource]
Description: Marchant "calculating twin" mechanical calculating machine, made 1945 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: calculating machine (lever wheel) Temporal: 1945 Source: Science Museum Creator: Marchant Calculating Machine Company Identifier: 1985-1857 Go to resource More Like this...
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