英语词汇“drop 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	drop relay
释义	drop relay drop relay [¦dräp ′rē‚lā] (electricity) Relay activated by incoming ringing current to call an operator's attention to a subscriber's line.
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