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大气速度提供举升力和空气阻力。
Air speed provides the lifting force and the drag.
youdao
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采用双缸驱动，机械同步，举升力大；
Double cylinder drive, mechanical synchronization, large lifting force.
youdao
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采用双缸驱动，机械同步，举升力大；
Double cylinder drive, mechanical synchronization, large lifting force.
youdao