Page 24 - Yoshihito Isogawa - The LEGO MINDSTORMS EV3 Idea Book_ 181 Simple Machines and Clever Contraptions-No Starch Press (2014)
P. 24

#21




                                                                          6                7



                                               ×2
                                                                                  ×4


                                          12:20 = 3:5





















         #22






                                                                             ×2             ×2           ×2




                                                                                          12:36 = 1:3

























                                                                                                          15

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