Air speed provides the lifting force and the drag.
大气速度提供举升力和空气阻力。
Double cylinder drive, mechanical synchronization, large lifting force.
采用双缸驱动，机械同步，举升力大；
In the selection of appropriate force, realize any position lifting member can stay.
在举力选择适当时，举升构件可实现任意位置的停留。
In the selection of appropriate force, realize any position lifting member can stay.
在举力选择适当时，举升构件可实现任意位置的停留。
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