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LEGO Technic COMPLETE GEARBOX ASSEMBLY 2 x 4 x 3 1/3 Trans-Clear Wormbox gear motor REDUCER block Mindstorms robotics ev3 NXT transparent robot building power functions part 6588: Amazon.de: Spielzeug
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LEGO MOC 3-speed gearbox with comfortable manual step switch by Don_Santos | Rebrickable - Build with LEGO
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LEGO MOC Lego Technic lockable automatic two speed gearbox [with free instructions] by SJ_LegoFan | Rebrickable - Build with LEGO
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