solenoid pilot operated directional valves
...械式方向阀 --- Mechanically Operated Directional Valves 电磁式引导方向阀 --- Solenoid Pilot Operated Directional Valves 双位式流量控制阀 --- Double Way-Throttle Control Valves ..
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solenoid pilot operated directional valves
电磁导控换向阀
以上为机器翻译结果，长、整句建议使用 人工翻译 。