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	Ibrāhīm Pasha IBS Ibsen ibsenesque ibsenian Ibsenism ibsenisms ibsenite ibsenites ibsens ibuprofen ibuprofens Ibáñez IC ic ic acid ic anhydride ic antigen ic artery ic cloud ic compass ic factor ic fiber ic hormone ic islands

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