For foot valve, replace inlet end connection with an F. V. screen housing assembly.
对于底阀，用一个F.V。滤网外壳组件更换进口连接管接头。
Therefore, V-type valve in the wide range of rate changes to provide precise control.
因此V型阀可以在广幅的变化范围内提供精确的控制。
The most common control valves are the parabolic plug and the V-ported valve.
最常用的控制阀具有抛物线形阀芯和V形开口阀芯。
The most common control valves are the parabolic plug and the V-ported valve.
最常用的控制阀具有抛物线形阀芯和V形开口阀芯。
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