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10 Ways to Build a 2:1 Reduction from Useful to Useless | LEGO Technic
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Destroying 28 Lego Mechanisms
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10 Custom Friction Clutches in LEGO Technic
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20 Mechanical Principles combined in a Useless Lego Machine
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5 More Simple Ways to Build a Lego Gripper
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5 Simple Periodically Reversing Gearboxes
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This Car Travels Farther Than You Push It
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