A.開(kāi)放空泄壓 B.關(guān)閉TV-A306降溫,待壓力穩(wěn)定后,緩慢的適當(dāng)放空泄壓 C.適當(dāng)升壓 D.等待有回流出現(xiàn)
A.>60%,<5% B.>60%,<20% C.>60%,<10% D.>80%,<10%
A.30,20 B.15,10 C.10,4 D.20,10