名词
中文翻译：指示继电器
同义词：
['indication relay', 'indicator relay']
例句：
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1.The indicating relay is used to indicate when the circuit is open or closed.
指示继电器用于指示电路是开还是关。
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2.The indicating relay was designed to improve the reliability of the system.
指示继电器被设计用来提高系统可靠性。
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3. The indicating relay was replaced with a more advanced model after several malfunctions.
在几次故障后，指示继电器被更先进的型号所取代。