Coal natural fire is one of the central factors leading to coal mine fire, and it is the emphasis in mine fire combat and protection.
煤炭自然发火作为矿井火灾的主要致因之一，是矿井防灭火工作的治理重点。
Coal natural fire is one of the central factors leading to coal mine fire, and it is the emphasis in mine fire combat and protection.
煤炭自然发火作为矿井火灾的主要致因之一，是矿井防灭火工作的治理重点。
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