在阀门前设置蓄能器。以减小冲击波传播的距离。
Accumulator in front of valve. To reduce the distance of shock wave propagation.
通过改变平衡阀的阀芯的过流面积来适应阀门前后的变化，从而达到控制流量的目的。
By changing the balance valve spool of the flow area to adapt to the changes before and after the valve, so as to achieve the purpose of flow control.
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