Modelos en 3D para dibujar alzado-planta-perfil Modelado de piezas partiendo de sus vistas Nivel 0 Nivel 1 Nivel 2 Generador 3D de piezas para dibujar posteriormente sus vistas
This film shows how pencils are made from graphite, clay and wood at the production site of Faber-Castell. Answer these questions: Who spoke well of pencils 120 years ago? What mineral is used in the pencil leads? How do we made pencils with different hardness? Why do we bake the leads? Talking about pencils, what is a sandwitch?
