用透射和扫描电镜观察了蕨状满江红茎尖、成熟叶腔内以及胚的腺毛超微结构。
The ultrastructure of Azolla filiculoides was investigated by means of transmission and scanning electron microscopy .
压水室采用导叶式结构能够尽快地把液体的动能转换为压力能，同时能够使泵腔内的流动更趋合理均匀，提高泵内气液分离的能力，并且能平衡叶轮径向力。
The volute of guide-vane structure can transform the kinetic energy to pressure energy as soon as possible, and improve the capacity of separating gas and liquid for the more balance flow in it.
假设桨叶以高速旋转进入、离开水面，叶背充满空泡，随边后空泡腔延伸到水面。
It is assumed that the blade of the partially submerged ventilated propeler enters and exits from water at high speed.
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