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Amazon.com: Domani Technic Power Functions Motor Set for Lego Technic, 1 x L-Motor, 1 x M-Motor, 1 x Receiver, and 1 x Servo Motor (L718U44M3719U7Z669BRU3A) : Toys & Games
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Amazon.com: PeleusTech Power Functions Set for Lego - 5Pcs Remote Control Motor Kit Compatible with Major Brands : Toys & Games
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The LEGO Power Functions Idea Book, Volume 1: Machines and Mechanisms: Isogawa, Yoshihito: 9781593276881: Amazon.com: Books
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