concentration of lower explosive limit
concentration of lower explosive limit
爆炸下限浓度
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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。
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