A.1;3 B.2;5 C.2;4 D.3;6
A.不充水,閉式噴頭開(kāi)放前 B.充水t閉式噴頭開(kāi)被后 C.不充水,閉式噴頭開(kāi)放后 D.充水,閉式噴頭開(kāi)放前
A.0.35 B.0.50 C.0.80 D.1.20