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Why do Power Functions motors need internal gearing - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
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Amazon.com: FINER SHOP Technic Power Functions Motor Set for Lego Technic, Upgraded Pack Crane Model, 2X M-Motors, 4X L-Motors, XL-Motos, 6X Battery Box, Receiver, Remote Control (48M717R3OFHMXQ4149X) : Toys & Games
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