英语词汇“abt system”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	abt system
释义	abt system \ˈäp(t)ˌs-, ˈa-\ noun Usage: usually capitalized A Etymology: after Roman Abt died 1933 Swiss railroad engineer who devised it : a system of tracking for mountain railroads in which two or more cograils are used and so arranged that the teeth are not opposite on any two of the rails
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