Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
When the blind man can't accurately buckle buttons.They can be respectively by concave and convex buttons.On the one hand, concave button correspond- ing to the vertical gap.On the other hand, the convex button corresponding to the horizontal gap.
College of Science & Technology Ningbo University