... fire prevention zone 消防分区 programmable fire detection zone 可编程序的火灾探测区 underground fire separation zone 地下防火隔离区 ...
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We are puzzled by the pervious to water, the underground coal seam fire prevention, the question of deep zone mining and coal mining from incidence in Jixi.
透水、地下煤层防灭火、深部开采问题、大倾角采煤已经成为困扰鸡西煤炭开采的技术问题。
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