A.貯液罐 B.皮碗 C.后出油口 D.推桿
A.進(jìn)排氣閥關(guān)閉 B.進(jìn)氣閥開(kāi)啟,排氣閥關(guān)閉 C.進(jìn)氣閥關(guān)閉,排氣閥開(kāi)啟 D.進(jìn)排氣閥均開(kāi)啟
A.20% B.0 C.100% D.50%