最后，模拟了柱面波在自由空间中的传播及空心圆柱体在柱面波入射下的近场和远场散射特性。
In the end, the propagation of cylindrical wave in free space, and the hollow cylinder scattering characteristics in near field and far field is completed when it is initiated by cylindrical wave.
在实测了淬火油换热系数的基础上，对轴对称空心圆柱体淬火时的温度场和组织场进行了模拟。
After determining the heat transfer coefficient of oil, the temperature, microstructure and stress variations during quenching were analyzed.
叶轮结构由特殊材料制作的一空心圆柱体，安装在主轴总成上端轴头上，用圆锥套和键联接传递钮距，高速旋转。
The structure of impeller made by special material a hollow cylinder and installed in spindle assembly with cone at the top of the head, axial and key connection from, high-speed transfer button.
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