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US4561628A Electromagnetically operated hydraulic actuator 失效
电磁操作液压执行机构

Electromagnetically operated hydraulic actuator
摘要:
An electromagnetically driven hydraulic actuator for driving an electromagnetic valve for which a larger valve operating force is required. The pilot control valve and the actuator piston are enclosed within the stationary magnetic core of the electromagnetic plunger of the actuator so that a compact driving unit is provided for driving the valve.
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