英语词汇“mine fan signal 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	mine fan signal system
释义	mine fan signal system mine fan signal system [′mīn ¦fan ′sig·nəl ‚sis·təm] (mining engineering) A system which indicates by electric light or electric audible signal, or both, the slowing down or stopping of a mine ventilating fan.
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