Koos Eissen is an associate professor at the Delft University of Technology and teaches freehanddrawing classes at the Faculty of Industrial Design Engineering.
库斯·埃森是代夫特理工大学的副教授，主讲工业设计工程的徒手绘图能力课程。
3
Courses in mechanical drawing and architectural drawing are not necessary and, in fact, may be less useful than general academic subjects and freehanddrawing classes.