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Ladies room door lock / lock

Ladies room door lock

In some public ladies room, women waiting outside don't know the people inside needs how much time. So I changed lock's color , It became red yellow and green three colors, yellow represents the need for a longtime, so that people can wait outside in which room need shorter time .

University

WuHan University of Technology

WuHan University of Technology
WuHan, China

Lv dishuang,
WuHan University of Technology

University

WuHan University of Technology

WuHan University of Technology
WuHan, China