Page 23 - Yoshihito Isogawa - The LEGO MINDSTORMS EV3 Idea Book_ 181 Simple Machines and Clever Contraptions-No Starch Press (2014)
P. 23

#19




                                                                     5

                                             ×2


                                                                                                        ×2




                                   20:20 = 1:1



















         #20



                                                                     3                                  ×2



                                      ×2





                                   24:24 = 1:1






















         14

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