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"यांत्रिक लाभ": अवतरणों में अंतर

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== बाहरी कड़ियाँ ==
* [httphttps://wwwweb.archive.org/web/20100113203833/http://technologystudent.com/gears1/geardex1.htm Gears and pulleys]
* [https://web.archive.org/web/20070718031943/http://www.swe.org/iac/lpLP/pulley_03.html Mechanical engineering — pulleys]
* [http://ca.youtube.com/watch?v=yfAdmRJDKIc Mechanical advantage — video]
 
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