Page 25 - Yoshihito Isogawa - The LEGO MINDSTORMS EV3 Idea Book_ 181 Simple Machines and Clever Contraptions-No Starch Press (2014)
P. 25

#23



                                                                                      3                 ×3







                                                                                         20:12 = 5:3






















         #24





                                                                             12:20:12:36 = 3:5:3:9



                               3
                                                ×3


















               ×2


                ×2



         16

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