Air_ray, modelled on the manta ray, is a remote-controlled hybrid construction consisting of a helium-filled ballonet and a beating wing drive.
以自然界的鳐鱼为模板的“空中鳐鱼”是一种由远程遥控的氦气气囊和羽翼振动产生驱动力组成的混合体。
It is present a method to design altitude control system for a high altitude airship using auxiliary ballonet charge or deflation and elevator combination control.
当时高度存在大误差时，采用副气囊和空气舵组合控制改变飞艇的姿态实现快速爬升或下降；
The ballonet inside the survival pack can be aerated and placed into the bag to postpone the sink time of the survival pack, so as to help a drowned person catch the survival pack.
救 生包内小气球使用时，吹大来放入袋子中，可延缓救生包下沉的时间，以利 于溺水者抓住；
The ballonet inside the survival pack can be aerated and placed into the bag to postpone the sink time of the survival pack, so as to help a drowned person catch the survival pack.
救 生包内小气球使用时，吹大来放入袋子中，可延缓救生包下沉的时间，以利 于溺水者抓住；
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