It has been proved by the field experiment that the method of rotary radial jet discharging gas accumulating in upper corner of coalface is really safety, dependable, economical and validly.
试验表明，旋转径向射流可安全、可靠、经济、有效的排放上隅角积聚瓦斯。
In this paper, the effects of nozzle shape on the properties of high pressure water jet discharging in air are investigated from theory and experiments.
本文从实验和理论两方面研究了喷嘴结构对高压水射流性能的影响。
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