A good setting for turning a single voice into a group, or one trumpet into a trumpet section. 一种可以将单个人声转换成一组人声或将一只小号转成小号组的上佳设置。
The study indicates that the thrust performance of bell nozzle is apparently lower than that of trumpet and conical nozzle because of the influence of circumfluence region in the diverging section, while the difference of thrust performance between conical nozzle and trumpet nozzle is insignificant. 研究结果表明钟形微喷管因扩张段回流区的存在,其推力性能明显低于喇叭形和锥形微喷管,锥形微喷管的推力性能同喇叭形微喷管较为相近。