https://img.theqoo.net/RGrSg

https://img.theqoo.net/CdKZc

https://img.theqoo.net/SEtAn

https://img.theqoo.net/CFkEN

https://img.theqoo.net/ezrDr

https://img.theqoo.net/bFELO

https://img.theqoo.net/azNgA

https://img.theqoo.net/knoLs

https://img.theqoo.net/rOuOg

https://img.theqoo.net/LoNaw

https://img.theqoo.net/ctSTY

https://img.theqoo.net/deyXy

https://img.theqoo.net/LRwvN

https://img.theqoo.net/QNvqd

유튜브 추천 떠서 보는데 흥미로워서ㅋㅋㅋㅋ외에도 다리 2층에 세울 때 절벽 몇칸이 필요한지 등 실험해본 거 같더라
일본어긴 한데 영상이라 괜찮을 듯

https://myoutu.be/kGHuJScIN6k