The results show that NOx emission was abated when the nozzle with two circle airjet was converted into the nozzle with two rectangular airjet.
研究结果认为：在燃气喷口两侧布置两个矩形空气喷口的烧嘴，氮氧化物排放量低于圆形空气喷口烧嘴；
2
The quality of is directly influenced by the performance of air-jet loom nozzle, so it is necessary to measure the pressure of air field which is formed by the nozzle.
喷气织机主辅喷嘴性能的好坏直接影响到织机气流引纬的质量，因此了解喷嘴气流场的压力情况十分必要。
3
Using two types nozzle newly developed, the authors succeeded in spining a series of bast-fibre-blend air-jet yarns.