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Have you ever met a situation when you turn off the light in your room, your eyes can not adapt to the sudden dark,so that you may knock against something.
When we turn off a light, it gets dark immediately,can we find a way to solve the trouble ?
Time delay switch is a switch which has automatic function to delay the tiime of turning off the light, you can set the turning-off time by revolving the turntable.
GuiLin University of Technology