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1,When we use electricity, there is often a risk of electric shock.This design is a combination of socket and switch, and the switch controls the power supply, whether the power supply is turned on or not is decided by the switch. Avoid the risk of electric shock when insert or pull out the plug, make it safer when using it.
2,When appliances are not working, the plug is not pulled out, still remain in the socket, they are still consuming the electricity,So, this design make it convenient that you just need to turn off the switch on the socket to cut off electricity thoroughly.
Shaanxi University of Science & Technology