名词
中文翻译：未封装的继电器
同义词：
['unprotected relay', 'unprotected relay', 'unprotected relay']
例句：
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1. The unenclosed relay is a critical component in the electrical system.
未封装的继电器是电气系统中的关键组件。
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2. The engineers carefully designed the unenclosed relay to ensure its reliability.
工程师们仔细设计了未封装的继电器，以确保其可靠性。
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3. The unenclosed relay was responsible for controlling the flow of electricity in the power grid.
未封装的继电器负责控制电力网中电流的流动。