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Title: Siren, Cagniard de la Tour pattern, with revolution counter [Go to resource]
Description: Siren, Cagniard de la Tour pattern, with revolution counter License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1900-1949 Source: Science Museum Identifier: 1987-561 Go to resource More Like this...
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