英语词汇“preselector”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	preselector
释义	preselector preselector (ˌpriːsɪˈlɛktə) n (Telecommunications) a system that automatically connects a caller to a free line Translations preselettore preselector preselector [¦prē·si′lek·tər] (electricity) Device in automatic switching which performs its selecting operation before seizing an idle trunk. (electronics) A tuned radio-frequency amplifier stage used ahead of the frequency converter in a superheterodyne receiver to increase the selectivity and sensitivity of the receiver.
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