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People often fasten their buttons wrongly when they were in a hurry or in the dark. To solve this problem, buttons designed to square and round could be helpful. The reason of this is that users cannot put the square buttons in the round holes, and round buttons cannot be fastened in the square holes equally.
Guangdong University of Technology
Guangzhou City, China
Guangdong University of Technology
Guangzhou City, China
Yang Ka , Liu Guanghai , Chen Anzhan , Guo Yingjun