File:Tusi couple.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	09:10, 19 June 2006		434 × 367 (45 KB)	commons>Konstable~commonswiki	Tusi couple - 13th century CE sketch by Nasir al-Din Tusi. Generates a linear motion as a sum of two circular motions. Invented for Tusi's planetary model. Category:Old astronomical prints

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