A.0.3 B.0.8 C.1.0 D.2.0
A.單面進(jìn)水;橫向布置 B.單面進(jìn)水;縱向布置 C.雙面進(jìn)水;橫向布置 D.雙面進(jìn)水;縱向布置
A.10% B.20% C.30% D.40%