短語詞組短語oxycen on -off valve 氧氣開關(guān)ON -OFF air valve 氣動開關(guān)閥pneumatic on -off valve 氣動開關(guān)閥;氣動切斷閥on -off ctrol valve 兩位式控制閥的控制high -speed on-off valve 高速開關(guān)閥High Speed On -off Valve 高速開關(guān)閥 返回 on-off valve