A.上窄下宽 B.上宽下窄 C.上下一样宽
A.10 B.20 C.40
A.48 B.56 C.64
A.关煤气→空废气交换→开煤气 B.关空气→煤气废气交换→开空气 C.关煤气→煤气废气交换→开空气 D.关废气→空煤气交换→开废气
A.无烟装煤 B.清洗桥管焦油 C.冷却荒煤气
A.2/1 B.1/3 C.1/4
A.K1 B.K2 C.K3
A.单向阀 B.换向阀 C.泄荷阀
