在煤矿安全问题中，瓦斯气体浓度是煤矿安全监测的重要指标之一。
In coal mine safety problem, gas strength is one of an important safety inspection factors.
爆炸极限是评定可燃气体火灾爆炸危险的主要指标之一。
The explosive limit is one of main index to judge explosion fatalness of fuel gases.
气体排放指标在未来某时还有可能进一步紧缩。
The emissions targets could also be tightened up at a future date.
气体排放指标在未来某时还有可能进一步紧缩。
The emissions targets could also be tightened up at a future date.
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