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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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更新时间:2025/3/2 0:10:30