And the situation in the long-term stable operation, use the type of impeller shaft to the edge of the smaller, and can be set up before and after the Vice-leaf cover.

且在长期运行中情况比较稳定，采用该型式叶轮的泵轴向力较小，且可以在前后盖板上设置副叶片。

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Rewind shaft is air inflated trapper leaf style so there is no core to wind on.

绕组轴是一个膨胀的叶轮形状，没有核心。

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