The latter consists of a electro -magnetic air valve, a pressure switch, a normal flow-controller and some other elements.

后者由电磁气阀，压力开关，恒流控制器等元件组成。

youdao

The latter consists of a electro -magnetic air valve, a pressure switch, a normal flow-controller and some other elements.

后者由电磁气阀，压力开关，恒流控制器等元件组成。

youdao