工作频率：动作频率要求高时，结构应优选直动式电磁阀，电源听优选交流。
Operating frequency: high frequency movements, the structure should be preferred direct acting solenoid valve, preferred to listen to the exchange of power.
工作频率：动作频率要求高时，结构应优选直动式电磁阀，电源听优选交流。
Operating frequency: high frequency movements, the structure should be preferred direct acting solenoid valve, preferred to listen to the exchange of power.
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