提出在流道设计时应最大限度地利用流道宽度方向的扩散，以免出口断面的有效面积过多地被旋涡挤占。
It is suggested that the diffusion in the horizontal direction of the conduit should be utilized to restrain the effect of the vortex.
在离心铸球工艺中，可应用有效重度和等效压头原理计算转速和内浇口断面积。
It is suggested to apply the principle of effective gravity and equivalent pressure head to calculate the rotational speed and ingate area in the processing of grinding ball by centrifugal casting.
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