Their maneuvering and control systems are made up of several propellers. This system has many disadvantages such as big volume, high consuming of energy, low total efficiency , high noise and vortex.
它们使用的操纵和控制系统大多是由多个螺旋桨推进器组成的，这样的系统体积大、重量大、能耗高、综合效率低，并有较大的噪音和尾涡。
The genesis of cold pool in moving-out Southwest Vortex, north-trough with south -vortex, self-organizing, and non-organizing local system types results in a high momentum difference in the low-level.
在西南涡移出型、北槽南涡型、自组织型、非组织局地类型中，冷池的形成导致出现了低层的高动量偏差；
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