当泵正常工作后，可通过阀截断水环轮和水泵叶轮的通道，并且放掉水环轮内的液体。
When the pump is normal work, but through the valve and pump water loop truncate the channel impeller, and put off the liquid water ring round.
当泵正常工作后，可通过阀截断水环轮和水泵叶轮的通道，并且放掉水环轮内的液体。
When the pump is normal work, but through the valve and pump water loop truncate the channel impeller, and put off the liquid water ring round.
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