在这里空气排出而水又从回流阀返回到叶轮入口。
Here the air and water discharged from the return valve to the back entrance of the impeller.
针对反应堆的特殊要求，主氦循环风机的设计包括总体结构、叶轮型式、冷却系统、轴承、测量仪表、电气贯穿件和隔断阀。
The design of the helium circulator involves the overall construction, the impeller type, the cooling system, the bearings, the instrumentation, the electrical penetrations, and the shutoff valve.
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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