英语词汇“keyless 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	keyless ringing
释义	keyless ringing keyless ringing [′kē·ləs ′riŋ·iŋ] (communications) Form of machine ringing on a manual telephone switchboard which is started automatically by the insertion of the calling plug into the jack of the called line.
随便看	period of performance and maintenance period of play period of prescription period of reactivity period of redemption period of review period of revolution period of service period of the three kingdoms period of time period of vibration periodogram periodogram roughness periodontal periodontal abscess periodontal anesthesia periodontal assessment periodontal atrophy periodontal attachment loss periodontal attachment system periodontal charting periodontal cyst periodontal debridement periodontal disease periodontal disease index

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