这是在丙酮蒸汽爆炸下限浓度左右的一个重要浓度范围。
This is an important range which is at about the concentration of the lowest explode limit of acetone vapor.
通过分析氨气扩散后爆炸浓度下限范围，探讨了如何设置警戒区的方法。
According to the range of lower explosive concentration limit, methods for how to set up warning region were research.
通过分析氨气扩散后爆炸浓度下限范围，探讨了如何设置警戒区的方法。
According to the range of lower explosive concentration limit, methods for how to set up warning region were research.
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