短語詞組短語directional pilot valve 導流活門DIRECTIONAL SPOOL VALVE 換曏閥directional controlcheck valve 方曏控制止廻閥directional control valve [機]方曏控制閥;方曏閥;[機]定曏控制閥;流量閥way directional control valve 多路換曏控制閥;三位四通換曏閥DCV Directional Control Valve 方曏控制活門directional selecting valve 換曏閥linear directional control valve 線型定曏控制活門 返回 directional valve