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secure electric plug / secure electric plug

secure electric plug
secure electric plug

We may touch the metal feet in the insufficient light when we plug it in.How dangerous! The secure electric plug have a protective layer.The retractable shell is wrapped the metal feet. It will retreat into the plug when the plug inserted the socket.


Zhejiang University of Technology

Zhejiang University of Technology
Hangzhou, China

tengfei sun,
Zhejiang University of Technology