It is shown that aerospike nozzle performance losses caused by free stream primarily result from increase of lift body base drag and decrease of plug pressure distribution.
结果表明，外流造成的性能损失主要体现在运载器底部阻力增加和塞锥表面压强降低两方面。
2
The needle valve can be closed through the rotation of a needle stem, and the oil cleaning device can also be driven to lift to clean out carbon deposit in the nozzle.
通过针阀杆的旋转即可以关闭针阀 又可以带动清油器升降，清除喷嘴中的积碳。
3
JETS Series pump is a jet pump or a full lift self-priming pump which is consisted of centrifugal pump and jet nozzle.