A1.1~1.3 B1.3~1.5 C1.5~1.7 D1.6~1.8
A1.5 B1.2 C1.3 D1.6
A不大于25m;不應(yīng)大于25m B不大于12.5m;不應(yīng)大于12.5m C不大于25m;不應(yīng)大于12.5m D不大于12.5m;不應(yīng)大于25m