The plug key is used as a switch when pressed it to allow or interrupt the flow of current. An electrical part acting like a switch is a plug key. A small metallic key is inserted into a metallic base to turn on the circuit and then the circuit is turned off if it is disconnected from its base.
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Description
The plug key is used as a switch when pressed it to allow or interrupt the flow of current. An electrical part acting like a switch is a plug key. A small metallic key is inserted into a metallic base to turn on the circuit and then the circuit is turned off if it is disconnected from its base.
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