但是安装到旋翼驱动轴上的桨叶数量是有限制的，而且飞机的重量同样需要考虑。
But there are limits to how many blades can be tacked onto the rotor's drive shaft, and once again weight becomes a consideration.
双轴桨叶式混合机是一新型高效的混合机。
双轴桨叶式混合机是一新型高效的混合机。对该机型的混合机理、结构特点及设计计算作了分析和探讨。
The twin shaft paddle mixer is a new efficient type. The mixing principle, strucure, design and calculation of this mixer were discussed.
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