采用它判别瓦斯与空气混合气体的爆炸危险性时，比用瓦斯浓度三角形更加全面、准确。
Using this chart to distinguish the explosion danger caused by the mixture of gas and air is more complete and accurate than the chart of gas detonation triangle.
爆炸时的临界氧浓度，则需用另一种三角形图示法予以确定。
Critical oxygen concentration for explosion is decided by a new triangle illustration method.
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