A.32B.48C.64D.128
A.10.0.0.0-10.255.255.255B.172.16.0.0-172.31.255.255C.192.168.0.0-192.168.255.255D.202.34.0.0-235.168.255.255
A.目的是送入新鮮空氣B.以免正壓時不利于排煙C.補風(fēng)量不小于排煙量的50%D.電氣連鎖啟動補風(fēng)機