发布时间:2025-02-06 17:58:51
如果是用纯42.5水泥配c30混凝土,水泥用340公斤,砂子用850公斤,石子用1050公斤,用水量控制在210公斤以内,按以上配合比生产,能满足设计要求。
03g372其建筑构造为03j5012钢筋混凝土雨篷yp1b2409182的详细配筋怎么找不到
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