A.普通硅酸鹽水泥 B.礦渣硅酸鹽水泥 C.火山灰質(zhì)硅酸鹽水泥 D.粉煤灰硅酸鹽水泥
A.HPB235 B.HRB335 C.HRB400 D.HRB500
A.2.1m B.2.3m C.3.5m D.5.5m