“directional control valve”的概念、定义、翻译、参考文献-科学参考

单词	directional control valve
释义	directional control valve Encyclopedia 工学方向控制阀释 directional control valve方向控制阀控制液压系统流体运动方向，对各个支路流体进行通断切换，以适应工作需求的阀。
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