结果表明，蜗室中间的主流速度在不同转速下均呈抛物线型分布；
The results clearly document that the curves of vertical and main velocity in the middle area of the volute are parabolic at all running speeds.
结果表明，蜗室中间的主流速度在不同转速下均呈抛物线型分布；
The results clearly document that the curves of vertical and main velocity in the middle area of the volute are parabolic at all running speeds.
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