https://youtu.be/j2t_VmzuZSc?si=Nb3pBy2cgbuHMI9s)
https://youtu.be/j2t_VmzuZSc?si=Nb3pBy2cgbuHMI9s
ī䰡 ȵ
µ
2-3
https://youtu.be/j2t_VmzuZSc?si=Nb3pBy2cgbuHMI9s)