英语词汇“lamp ballast”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	lamp ballast
释义	DictionarySeeballast lamp ballast ballast 1. Coarse stone, gravel, slag, etc., used as an underlayer for poured concrete. 2. A device used to provide the required starting voltage and operating current for fluorescent, mercury, or other electric-discharge lamps. 3. Class P: A ballast for a fluorescent lamp which meets the requirements of the Underwriters’ Laboratories, Inc.; includes an automatic resetting thermal protector to remove the ballast from the circuit if its temperature exceeds a specified value. 4. Same as constant-wattage ballast. FinancialSeeBallast
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