A.M15 B.M10 C.M7.5 D.MU5.0
A.MU20 B.MU15 C.MU10 D.MU7.5
A.燒結(jié)多孔磚 B.燒結(jié)空心磚 C.燒結(jié)實(shí)心磚 D.粉煤灰磚