electromagnetic (type) relay

例句：

1. 1.The electromagnetic relay is used to control the flow of electricity.
   电磁继电器用于控制电流的流动。
2. 2.The electromagnetic relay is a crucial component in many electrical systems.
   电磁继电器是许多电气系统中的关键组件。
3. 3. The electromagnetic relay is responsible for activating and deactivating circuits.
   电磁继电器负责激活和关闭电路。