英语词汇“spring switch”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	spring switch
释义	spring switch noun : a switch consisting of a pair of split switch points held in running position by a stiff coil spring and designed to return to that position after being thrown over by trailing wheels from the diverging route
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