短語詞組短語directional pilot valve 導(dǎo)流活門DIRECTIONAL SPOOL VALVE 換向閥directional controlcheck valve 方向控制止回閥directional control valve [機(jī)]方向控制閥;方向閥;[機(jī)]定向控制閥;流量閥way directional control valve 多路換向控制閥;三位四通換向閥DCV Directional Control Valve 方向控制活門directional selecting valve 換向閥linear directional control valve 線型定向控制活門 返回 directional valve