propulsion 雅思GRE

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进器，给出了控制流程图，建立了运动方程。

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

飞船或飞艇—浮升器之一种，配备有进方法和操纵舵。

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机系统，将其作为增程空空导弹的未来进选项。