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Awesome LEGO technics with gears - extending arm

by VPt3OuR1F3gJiv9Y4vQVug
Shows the movement and close ups on the construction so that you have a good chance of recreating them. Good for use with a robot!

Runtime: 00:11

From: icon YouTube   URL: http://www.youtube.com/watch?v=aKgJ1sNPvEY
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