propulsion 六级GRE雅思

flight vehicle propulsion system

行器推进系统

they dive and use their wings for propulsion under water.

它们潜入水下，用双翼推进。

A four-joint flexible underwater pisciform propulsion system is developed and the control flow chart is presented.

设计了四关节柔性水下仿鱼形推进器，给出了控制流程图，建立了运动学程。

2 Class B: AIRSHIP or DIRIGIBLE -An aerostat, equipped with means of propulsion and steering.

级：船或艇—浮升器之一种，配备有推进法和操。

Preliminary analysis shows that the propulsion force is relative to serval factors, such as liquid viscousness, drive fin wet area and offset, etc.

析表明,鱼形微器人推进力与流体的粘性系数、摆翼面积和偏移角等因素有关。

The predevelopment phase for the injector of a new 27.5kN engine, which will be used in the Ariane 5 upper stage and the Hermes spaceplane propulsion module, has been completed.

欧洲阿里安-5运载火箭的上面级和使神号航天的推进装置将使用一种真空推力为27.5千牛的发动,这种压力输送式发动的预研工作已经结束。收藏指正

In addition, the USAF continues to fund development work of the Aerojet (formerly Atlantic Research) Variable Flow Ducted Rocket ramjet system as a future propulsion option for an extended range AAM.

此外，美国空军继续投资于航空喷气研究所（原来的大西洋研究所）的可变喷流管火箭发动系统，将其作为增程空空导弹的未来推进选项。