单词	underfrequency relay
释义	underfrequency relay noun : a relay actuated by a fall in electrical frequency Word History Etymology under entry 3 + frequency
随便看	foresaw foresay foresaying foresays foresee foreseeabilities foreseeability foreseeable foreseeing foreseeingly foreseen foreseer foreseers foresees foreset foreset bed foresey foreshadow foreshadowed foreshadower foreshadowers foreshadowing foreshadowings foreshadows foreshaft

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