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Build Yourself A Screw Propelled Robot To Tackle The Dirt: Wheels and tracks are common choices for robot propulsion, but they’re not the only game in town. You can do some nifty things with long extruded screws , and they …read more https://t.co/WpZLEYeI50 #hadtips https://t.co/A8eFWSlvB4

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