You need to unblock this content by setting your broser.
ブラウザーはこの内容をブロックしないように設定してください。

INFO:
Discover how design software runs three-dimensional printers by translating 3D shapes into triangles. This video focuses on the composition of 3D polygons and introduces the idea of printing in three dimensions as stacking thin layers of material, taking math out of the classroom and into real world problem solving.
Three-Dimensional Printing | PBS LearningMedia