The method of system transformation, combining sealing are consequently used, and the problem of small mine air leak is solved.
采取系统改造，结合堵漏的方法，解决了小井漏风问题。
The method of system transformation, combining sealing are consequently used, and the problem of small mine air leak is solved.
采取系统改造，结合堵漏的方法，解决了小井漏风问题。
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