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A switch is an electronic component used to turn on and off circuits and control the flow of current. ‌

Switches are common components in electrical equipment, whose main function is to control the on/off of circuits, thereby controlling the opening and closing of electrical appliances. According to their different purposes and structures, switches can be classified into various types, such as knife switches, electromagnetic switches, etc., used to connect or disconnect circuits. In addition, switches are also used on fluid pipelines as flow control devices, such as throttle switches, valve switches, etc. Wall switch is a specific type of switch that is usually installed on the wall and used to control the switch of electrical appliances such as lighting. ‌

The working principle of a switch is based on the closed or open state of its internal electronic contacts. When the contact is closed, current is allowed to flow and the circuit is connected; When the contact is open, current cannot pass through and the circuit is disconnected. This simple mechanical operation makes switches an indispensable control component in electronic devices

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