Some measures that gas accidents should be prevented because of the variety of the atmospheric pressure are put forward in being excavated roadway,and the regulation of the variety of t...
英
美
- 并提出了如何防止由于大气压力的变化而引起的掘进巷道瓦斯事故,合理利用大气压力的变化规律为矿山生产服务。