英语词汇“ballast tube”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	ballast tube
释义	ballast tube ballast tube [′bal·əst ‚tüb] (electricity) A ballast resistor mounted in an evacuated glass or metal envelope, like that of a vacuum tube, to reduce radiation of heat from the resistance element and thereby improve the voltage-regulating action.
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