短語詞組短語Piston reducing valve 活塞式減壓閥;活塞昵減壓閥;活塞式降低壓力閥;活塞昵piston air valve 活塞式空氣閥;活塞氣閥piston governor valve cage 活塞調(diào)節(jié)閥座Inclined piston check valve 斜板活塞止回閥piston type valve 柱塞閥piston -valve induction [機]活塞閥進氣load piston check valve 負荷柱塞單向閥piston governor valve 活塞調(diào)節(jié)閥piston slide valve 活塞式滑閥;活塞滑閥 返回 piston valve