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Title: Mounted wheel rule [Go to resource]
Description: Wheel rule, double wheel with calibrations marked on both. Operated with a foot pedal and mounted on base. Dimensions: 43" diam. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: wheel rule Source: Science Museum Identifier: 1981-7188 Go to resource More Like this...
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