英语词汇“vacuum brake”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	vacuum brake
释义	Word Frequency vacuum brake noun a brake system, used on British and many overseas railways, in which the brake is held off by a vacuum on one side of the brake-operating cylinder. If the vacuum is destroyed by controlled leakage of air or a disruptive emergency, the brake is applied. It is now largely superseded by the Westinghouse brake system
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