A.燒結普通磚、燒結多孔磚 B.燒結普通磚、水泥多孔磚 C.燒結多孔磚、水泥多孔磚 D.水泥多孔磚、粉煤灰磚
A.0.5% B.1% C.1.5% D.2%
A.0.5min B.1min C.1.5min D.2min