多项选择题
A.烧结普通砖 B.烧结多孔砖 C.水泥多孔砖 D.粉煤灰砖
A.0.5% B.1% C.1.5%
A.1min B.2min C.1.5min
A.10kN B.15kN C.20kN D.25kN
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