#scarap
基本失敗してる
これがギリギリ一番まとも
3D Printed Trumpet - YouTube
DIY Trumpet from plastic pipes - YouTube
How to make (and play) a 3D PRINTED TRUMPET - YouTube
3D Printable Trumpet : 4 Steps (with Pictures) - Instructables
3d printed trumpet, first try by a non trumpet player - YouTube
Profi-Trompeter testet 3D-Druck Trompete - YouTube
