英语词汇“underfrequency relay”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	underfrequency relay
释义	underfrequency relay \ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ ̷ ̷ ̷ ̷-\ noun Etymology: under (III) + frequency : a relay actuated by a fall in electrical frequency
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