英语词汇“machine ringing”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	machine ringing
释义	machine ringing machine ringing [mə′shēn ‚riŋ·iŋ] (communications) In a telephone system, ringing which is started either mechanically or by an operator, after which it continues automatically until the call is answered or abandoned.
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