A.貨艙惰化 B.貨艙驅(qū)氣 C.貨艙預(yù)冷 D.貨艙通風(fēng)
A.50%~60%;40% B.70%~80%;60% C.98%;80% D.98%;90%
A.80% B.90% C.95% D.98%