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Wind-up time swatch / Wind-up time swatch

Wind-up time swatch
Wind-up time swatch

Add the function of timing on the basis of the switch，that can turn off the lights in time when people turn the knob. The design is to protect people from being hurt when the light turned off.

University

Dalian Jiaotong University

Dalian Jiaotong University
Dalian, China

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