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Can speak the window lock / Can speak the window lock

Can speak the window lock

When people out of the door, usually heart will doubt the window have locks, need to go to the window to try. It's not convenient. This design simplifies the tedious steps, you just stand in situ see the window lock, lock - if the window display green fluorescence, the article shows the window no lock, On the other hand, the window is locked.
This article fluorescence don't need external power, when the window lock the article fluorescence for outdoor, through the absorption of solar energy to store energy. Then luminous

University

East china jiaotong university

East china jiaotong university
nanchang jiangxi, China

Design

East china jiaotong university

East china jiaotong university
nanchang jiangxi, China