In the way of loading, electro-hydraulic proportional valve is used.

在加载方式上，采用电液比例阀。

A proportional valve spool therefore has wider lands with notches cut into the edges.

比例阀阀芯具有比较宽的边缘带有槽口的台肩。

For hydraulic pneumatic GDM, G Series rectangular plug valve, proportional valve plug;

用于液压气动的GDM，G系列矩形阀插头、比例阀插头；

Proportional valve can be set at the same time the proportion of the valves from several …

比例阀可以按设定的比例同时抽取几种溶液进行混合的阀门。

There are some methods of proportional valve test, which need many elaborate test instruments.

目前比例阀测试的办法比较多，所需的测试仪器繁多复杂。