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

单词	backup relay
释义	backup relay backup relay [′bak‚əp ′rē·lā] (electricity) A relay designed to protect a power system in case a primary relay fails to operate as desired.
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