对于底阀，用一个F.V。滤网外壳组件更换进口连接管接头。

For foot valve, replace inlet end connection with an F. V. screen housing assembly.

youdao

对于底阀，用一个F.V。滤网外壳组件更换进口连接管接头。

For foot valve, replace inlet end connection with an F. V. screen housing assembly.

youdao