The meteorite usually contains the mineral assemblage that does not exist or is unusual on the earth. And there are some traces of the high-velocitycombustion on it.
陨石多半带有地球上没有或不常见的矿物组合，以及经过大气层高速燃烧的痕迹。
2
Applying highvelocity burners and pulse combustion control system, it is possible to get accurate temperature control and even distribution of temperature of furnaces.
选用高速烧嘴及脉冲燃烧技术可以使热处理炉获得较精确的温度控制及较高的炉温均匀性。
3
The effects of nozzle structure, fuel gas injection velocity and excess air coefficient on NOx emission in high temperature air combustion were investigated.