four- and five-port servovalves 四油口和五油口伺服阀
The power stage of servovalves is spool valve, playing the role of hydraulic pressure amplifier.
电液伺服阀的功率级一般为滑阀，起液压放大器的作用。
Manifolds can be either machined components only or complete assemblies including check valves, pressure switches, servovalves, solenoids or filters.
歧管可以只是机械零部件或是完整的组件，包括止回阀，压力开关，伺服阀，电磁阀或过滤器。
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