Page 34 - Yoshihito Isogawa - The LEGO MINDSTORMS EV3 Idea Book_ 181 Simple Machines and Clever Contraptions-No Starch Press (2014)
P. 34

#37



                                                                      5                   7







            20:20 = 1:1























         #38




                                                                   5
                  ×2                                                       ×2               ×2           ×4
                                                   ×2



                           20:20 = 1:1
























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